(I had the idea of an MCU x criminal minds story so here we go)

Acid attacks were becoming more and more frequent.

People couldn't leave their apartments without fear they were next.

The avengers were not working on these attacks, as word had spread from Asgardian citizens that Odin had begun planning an attack. They weren't really sure how realistic the king of Asgard attacking a tiny planet was, but they couldn't take any chances.

That left Peter to do as much as he could.

So far he'd been lucky, spidey senses told him when to duck and when to turn. He'd almost been hit once but was quick to recover and took down the guy.

The problem was, there were so many people doing it, it appeared to be a team of individuals but he didn't know.

Meanwhile the members of the BAU's finest team were working tirelessly. Hoping for a break in the case that would help them track down the leader.

This unsub-as describes by one survivor-was seen only once outside of whatever hole he hid in. Apparently he was bald, and wore a hood to hide his face, from what could be seen he had scarring from his neck up.

"Baby girl, look for people who had reported acid attacks since before this started" Morgan said to Garcia over the phone.

"Alright checking now, you're going to have to give me more than that...there are over a thousand names"

"Hotch said he might be mid to late thirties, it would've taken some time to heal into scars so try around ten years ago"

"Alright that's a little better but I need more"

"Try people with pervious charges of assault, that's all I've got for now babygirl"

"I'll hit you back when I've got something, Garcia out"

Morgan chuckled as he put his phone away, "hey pretty boy how's the geo profiling going?" The acid attacks had been all over the city, meaning there was no comfort zone.

"Not well, there are so many variables. We have to factor in the idea that these are individuals formed into some sort of group. This means individual houses and individual comfort zones" Reid sighed and pinched his nose.

"Migraine?" Morgan asked, already knowing the answer.

"When don't I have one" he sighed, before turning back to the map.

The spandex clad superhero swung all over town, he'd stopped four acid attacks within the last hour. He just hoped whoever was responsible for finding the group leader would hurry up.

Then he got an idea.

"Karen, hey can you find out whose leading the investigation? I have an idea for a surprise"

"Of course, processing information...Aaron Hotchner is the teams leader, the team being the top behavioral analysis team from the FBI"

"Woah FBI's here? Well I guess that makes sense, oh acid attack on twenty third. Heading over now"

The muscles in his arms strained with each swing, the adrenaline pushed him to move faster until he landed in front of a man wearing a mask. He had a spray bottle in his hand and looked ready to fire.

"Let's talk this out mask man, hand over your identity"

The man didn't speak but swung his fist out which peter easily dodged.

"Oh it's the thinking you were fast enough for me" he webbed the mans left wrist and shot the web to the wall, taking the man with it. "You really thought you did sum, anyways chile I'm taking you to one Aaron Hotchner"  he moved to web the mans other hand but didn't move fast enough, the masked person had uncapped the spray bottle and splashed it all over peter.

He bit his cheek to keep from crying out and slapped the bottle away. Though blurry eyes he webbed the man up completely and followed Karen's instructions towards the precinct where the team was.

He landed on a perch outside one of the windows, leaned down to unlock it and slid it up. He pulled the man in after him, struggling against his weight and the pain covering his body. His hands were shaking and Karen's warning light was flashing.

"Peter you're experiencing high level chemical burns please get help"

"Not yet K, I've got a bad guy to drop off, wish I had some wrapping paper and a nice bow"

It was then the first person saw him, she turned to the tall dark haired man next to her and pointed at peter.

"Who are you?" The man asked walking over, his hand on his gun.

"Oh that's Spider-Man, he helps us. Basically does our jobs for us, he's caught at least half of the people down in lockup." One of the deputies said.

"Oh, they don't have this in Virginia, I'm special agent Aaron Hot-"

"Hotchner, right I caught this man walking through town with a bottle of acid. Thought I'd bring him to you" he winced beneath the mask as he showed the webbed criminal towards the man. He looked angry, but the kind of angry where he really wasn't angry his face just was. His eye brow bones must hurt from frowning all day.

"Who is this?" Asked Morgan as he stepped out of the briefing room, followed by Reid.

"I think I read up on him, his names 'Spider-Man' and he's a vigilante but like a good one. He doesn't kill people he just locks them up, so like a glorified police officer" Reid ranted. Morgan placed a hand on his shoulder to tell him to calm down.

"Ok can you get this guy to an interrogation room." Hotch told one of the deputies.

"I'll go with you, I have some questions" Morgan said following the two.

"Me too, but for another person" Reid muttered, he walked over to the shorter man in a suit. "How can you do it, is it part of the suit. The climbing walls and web-shooting?"

"Oh right, we'll I was bit by a radioactive spider that escaped from a lab facility. I got really sick then all of a sudden I woke up with these really cool abilities, climbing walls is just something I can do. And the web shooting, I can produce webs from my wrist but they aren't as strong as the formula I created, so I have web shooters built in, courtesy of Tony Stark" The man explained, although he sounded more like a kid. By the end of his speech he started swaying, it was only then that any of us realized what happened.

"Woah ok" JJ said as she caught him before he could fall. She laid his he'd gently on the ground and looked up, "how didn't we see the acid marks on his suit?"

"We were just hyper focused I think, let's get him to a hospital. JJ, stay here and work with the officers. Reid come with me to the hospital we need to see what this man knows" Hotch ordered, they all split up.

Reid watched as Hotch bent down to pick up the hero. "He's really light, how old is he Reid"

"I don't know it wasn't in any reports"

They walked out the door and laid him gently across the back seat. They started the drive to the hospital.

"Wait" Reid said suddenly, "if he's taken to the hospital they'd have to take off the suit"

"So?" Hotch asked turning left.

"Well he obviously has a reason to keep it on other wise he wouldn't wear it. Maybe we should call Tony Stark, he said he worked on his suit"

"Iron man? I don't know I mean, I guess the avengers do help us. I don't know how we'd profile aliens, and that one attack from that raven haired man, Loki I think..."

"Yeah, we should thank them when we see them. I'll have Garcia find his number" Reid pulled out his phone as Hotch stalled the car. "Hey Garcia, can you find Tony Starks cell number"

"Oh boy genius I can do anything, and did you say Tony Stark? As in the iron man" she exclaimed.

"Hurry Garcia, we have Spider-Man in the car and he was attacked with acid, I'll tell you the whole thing when this is over"

"Alright I've sent the number to your cell, good luck. Garcia out"

Spencer looked at Hotch and Hotch nodded. He typed the number into the phone and put it on speaker phone. He passed it to Hotch as it rang.

"Hey I don't know who this is but you're not supposed to have this number, strictly for the people I somewhat tolerate. Is this Cap again? I told you if you needed a phone I could get you one you don't need a burner phone I me-"

"Is this Tony Stark?" Hotch asked.

"The one and only, who am I speaking to?"

"This is supervisory special agent Aaron Hotchner with the Behavioral analysis unit of the FBI" he paused, "I have a man known as spider man in my car, he was hit with acid while arresting one of our Unsubs. We didn't want to take him to the hospital as they might out his identity"

"Oh my Jesus fuck, ok I'm sending one of the avengers ambulances. You and whoever's in the car with you can go with him. God damn he's gonna give me another heart attack someday. Thank you for calling I'll see you soon"

"Don't you need our location?" Hotch asked, raising an eyebrow despite it being an audio call.

"Already got it" the line went dead as Tony hung up and not a minute later they heard sirens. The ambulance pulled up next to the government issued SUV.

The two agents hopped out of the car and opened the back door, moving out of the way as a blonde man helped a shorter brunette man with glasses load the Spider-Man into the ambulance.

"Coming?" Asked a red head.

"Yeah" Reid answered for the both of them and they climbed inside.

"During this you're probably going to find out the identity of him. Please can you be trusted not to tell anyone, it's a matter of being targeted or living" the man with glasses asked, as he poured a clear liquid over the worst burns.

"Of course" Hotch and Reid answered.

"Ok good, Happy step on it" the driver pressed the gas and they were flying through the streets of New York.

Tony was pacing in med bay, his hands were shaking. Two random federal agents were bringing his kid to the tower with acid burns. He's had enough trouble with the government to know not to trust them. But now he had no choice. His heart was hammering in his chest and he wondered if he might actually have a heart attack. It didn't seemed too far fetched.

Bruce, Natasha and Steve rushed Peter in and straight to one of the sterilize rooms.

Tony waited until the doors swung shut to turn and face the federal agents.

He almost laughed, he really would have if he wasn't so stressed.

One of them seemed to have a permanent frown, it actually didn't twitch once. And the other looked like a pipe cleaner with eyes, he couldn't be old enough to be a federal agent.

The first man walked over and introduced himself, "hi I'm Aaron we talked on the phone" he held his hand out and tony grasped it, shaking it once.

"I'm Spencer Reid" the other said, Tony got a vibe that he didn't like shaking hands and settled for waving. "Oh" Spencer said, probably surprised Tony had made that inference.

"How's the investigation going? Jarvis told me the gist of what's happening but we've been busy with possible threats from Asgardian gods"

"I was going to ask but then I remembered that aliens have attacked this city on multiple occasions" Aaron said, "we have one suspect in custody, courtesy of the Spider-Man and considering he was able to be caught means he will be easy to break. Agents Rossi, Morgan, and prentiss just need to crack down on him"

"Damn, well let's sit. I'm guessing you're going to want to ask him questions?"

They nodded.

"And because his suit was half melted which is going to be a pain to rebuild and design, that means you're going to meet the kid under the mask"

"Kid?" Spencer asked.

"Yeah he's sixteen" Tony said nonchalantly.

"Sixteen and he's achieved all that. Reid he may give you a run for your money, is he smart?"

"Oh incredibly, he runs circles around me in the labs and I graduated MIT at fifteen (prolly not accurate but for the sake of the story🤫)

"Spencer here went to highschool at twelve and he has an IQ if 187, can read 20,000 words per minute and has three PhD's"

Tony looked a the younger man curiously, the more he thought about it the more he realized that Aaron was like him and Spencer was like peter. Maybe they'll get along?

"That's impressive" he complimented, Spencer muttered a thank you. Awkward just like peter.

"Tony, he's awake now" Bruce announced.

"Good, you two can come in. You have to ask your questions"

The three men walked through the doors and towards the kid on the bed.

"Hey pete, What have I said about acid attacks?"

"Always attack from behind" peter mumbled, "sorry Tony I just thought I'd bring the FBI a little gift. Which by the way Hello" he waved at the agents.

"Hi, I'm Spencer Reid and this is Aaron Hotchner. We call him Hotch though" he bent down to whisper to Peter, "and he isn't always so grumpy looking" peter laughed, and Spencer took the seat next to the bed.

"To answer your questions, no I haven't been able to capture any more members, yes I think it's a group, yes I have a slight idea as to where they are based. And yes I have stopped a few attacks, they just managed to get away."

"How'd you know what I was going to ask?"

"I just had an idea, they're the base line questions in a situation like this"

"That they are" Aaron said, "thank you for your help kid, I just got word from Dave that the man you caught led them straight to the leader. He's being apprehended at the moment"

"Cool" Peter said. "I'm glad, stopping acid attacks from groups aren't interesting, there's no time to talk to them they just want to splash and dash"

Hotch chuckled his eyebrows softening, "yeah they do like to splash and dash"

"Oh you two mentioned three other members of your team?"

"Well four but only three in interrogation. The other's Agent Jareau, she the media liaison"

"Well four then, you guys can stay in the tower if you ever need to. It's a little more private than the precinct-"

"A little? I was able to climb in through a window with a suspect in tow and no one saw me until I was inside."

"To be fair not a lot of people can climb buildings pete. Oh yeah his names Peter Parker by the way, but as I was saying we have state of the art machines with coding mainframes that are impossible to hack. They also may or may not be pre hacked into every data base on the planet, using Stark built satellites"

"I'm not even going to say anything because I'm pretty sure our technical analyst has done the same, she almost got the princes number"

"I want to meet this girl she sounds fun"

"She's definitely eccentric"

"Just like you Tony" peter laughed.

"Anyway, like I said you're welcome at the tower anytime. And the number you called is free to use"

"Does that mean you tolerate us?" Hotch joked, Reid gaped at him, he hadn't heard Hotch talk that way since before Haley died.

"Well considering I just met you and I already like you more than half of my team, then yes I tolerate you" Tony laughed.

Spencer and peter just shared a look and started laughing.

I can make a part two where the whole BAU team meets the Avengers and whatnot. I might write it if someone wants me to or I might just write it when I get the chance.

Thank you for reiding, bye lovely's 🖤