If you get easily bored by reading Hiccups conclusions you can just read the Bold letters cuz they are important clues.  But if you love the mystery and in it all, read it all cuz its gonna get chilly here.

ABC - his thoughts
ABC - clues
Hiccups POV

Once we got in a taxi, I side glance at Y/N and saw her glancing at me for a minute then turn away. Obviously, has questions for me, yet too shy to say anything. I can see hesitation in her eyes.

I guess I've got to start a conversation, I inhaled deeply since I'm not really good with people.

"you've got questions, "

"yeah well, where are we going? " she said quickly.

"crime scene. Next"

"who are you, What do you do? " Isn't that already obvious? She can't be THAT stupid.

"I'll let you guess? "

" I'd say private detective but the police don't go to private detectives. " there you go,

"I'm a consulting detective, the first one in the world, I invented the job. If the police are out of the depth,
-which is always -
They consult me. "

"the police don't consult amateurs " I looked at her shock at what she said. Did she just call me an amateur?
For the love of Thor, why are people so frustrating to deal with.

Time to prove her wrong.

"when I met you yesterday, I asked Berserk or Wingmaiden, you look surprised. "

" yeah, how did you know? " she looked at me and I started to grin. Easy

"I didn't know, I saw.
Your haircut, the way you stand says military "
I remembered her both hands in the back, legs apart like a soldier pose

"and your conversation as you entered the room so an army doctor, obviously. Your lips really bad when you walk, but you don't ask a chair when you stand like you've forgotten about it so it's at least partly psychosomatic that says the original
circumstances of the injury were traumatic. Wounded in action then.
" I pictured back where we first met. Scanning her eyes, posture, and face.

"how did you know about the uhmm, brother? "

"your phone it's expensive, e-mail enabled, MP3 player. " I saw the phone in my mind like that day, I kept swiping and looking around her phone checking every intricate details in it.

"and your looking for a flat share, you wouldn't waste money on this so its a gift then "  I grab her phone from her hand that she was examining while I was explaining.

"Skye, clearly a family member. Not your father, this is a young man's gadget could be a cousin but your a war hero who can't find a place to live.
Unlikely you've got an extended family, certainly someone very close to.
So brother it is, he gave the phone to you, that says he wants to stay in touch. Your looking for a cheap accommodation and you're not going to your brother for help. That says you've got problems with him.
Probably when you entered the army than some kind of family business or something.
There you go, so your right. " I finished it off as I clapped my hands and returned the phone to her

"I'm right? Right about what? "

"that the police don't consult 'amateurs ' " I fingered quoted.

"That.... Was amazing " she pointed out in astonishment that's a new reaction. I looked at her confuse.

"you.... Think so? "

"of course it was! It was quite extraordinary, quite extraordinary " she exclaimed. She's quite a weird one. But who am I to judge, I'm a high functioning sociopath after all.

"that's not what people would normally say "

" then I'm not like most people, but what do they say though? "
I waited for a moment to tell then inhaled deeply

"piss off " I said calmly. But she started to chuckle then turns into a small laugh and I joined in.

A few minutes later, we arrived at the crime scene

"by the way, Skye is short for Skyler, a girl. " she stated as she walk out chin up

"it's a girl. There is always this twist " I said angrily, I heard her laugh

Then Snoutlout came.

"Hiccup?! What the hell are you doing here? " he shouted

" Astrid called me, so back away. " I ducked under the police tape as Y/N was about to follow me, Snoutlout stopped her.

"sorry sweet cheeks , but I can't let you in, but you can enter my heart, yet you already have " she scoffed clearly disgusted.

"she's with me Snoutlout, " he looked at me weirdly like he wasn't expecting that answer and then he huffed but
Y/N just passed by him and just ducked under the tape and walked ahead to the building

"Hiccup with a girlfriend, that's a total nightmare to see " I looked at him, ugh he got it wrong

" were just partners since I know Eret or you wont worked with me, there ain't a thing going on " I said as I left him as he laughed with everybody else.

"so can I take her out then!!!"

I entered the house where Y/N was
already there waiting for me, arms crossed looking angry.

" is it okay to commit murder in a murder scene? " she asked and I just shrugged as a reply

Astrid called from the stairs "hey guys! Up here, " she then ran off as we just followed her in a small empty room.

"who is she? " she pointed to Y/N

"she with m-"

"I'm Y/N Maxwell,  army doctor. Here to help him with these investigations "
She quickly said shaking her hand, Astrid smirk. And greeted her with kindness as she firmed her hand shake.

"oh I like her, this one's a keeper " she whispered to me. I clapped my hands loudly

"let us go on with the investigation, please " I complained as I put on gloves and looked at the body and started to examine it.

"you got two minutes " Astrid sternly said

Might need more though.

I looked at the woman with red hair, all in pink, Dress profesionally. I stepped forward to see the floor  written
R A C H E. Her finger at the end of E.

Her nails ruined at the edge, left handed. RACHE is German for Revenge.

But no, can't be. It seems that she was to write more, maybe she was to write RACHEL

I kneeled down and wiped my hand on the back of her coat. Wet.
Under her collar is also wet.

Must have tried to cover herself from rain. But there isn't rain

I grabbed my magnifying glass and examined her jewelries.

Her bracelet, necklace and earrings are all cleaned but her engagement ring, it's dirty. She must be married unhappily. By the state of her ring its age must be 10 or more years.

I removed the ring from the finger and the inside is clean unlike the outside, so regularly removed

So Serial Adulterer.

"I don't got much "

"-shes German, " I heard Eret say, he was leaning at the doorway. I stood up and walk to him

"Rache is German for revenge so -"
I cut him by closing the door ignoring his conclusion

"yes, thank you Eret "
The Dumb

"she's not German but she's out of town though. Intended to stay in Berk for one night" I concluded while searching the web for any city near by that rained two hours ago

"Y/N come here and examine her. "

She sighed and went closer,
"what am I doing again? "

"helping me make a point "

"I thought I was helping you pay the rent "

"yeah well, this is a lot more fun. "

"Fun? There's a woman lying dead "
She has a point, I let her continue to
examine the body

"probably passed out, choked on her own saliva. " I nodded and told Astrid my observation.

"in her late 30's, proffesional person
Travelled from Yensid intended to stay in Berk for one night, it's obvious by size of her suitcase. Married Unhappily for 10 years or so. She has a string of lovers but none of them knew she's married"

"that's brilliant " Y/N mumbled

"you know your doing that out loud, right? " she quickly apologizes

"Yensid? " Astrid asked

"her coat is damp but there wasn't any rain in London, it hasn't dried yet so must be 1 hours. So in which town that rained but only needs 1 hours to travel so Yensid "

"how did you know she has a suitcase? " Astrid asked again

"back of her right leg, tiny splash marks in back heel and calf not present on her suitcase. So she was dragging a wheeled suitcase behind her with her right hand. Smallish case, going by the spread "

"but there wasn't any case " I looked at Astrid in wonder, there has to be a suitcase

"Suitcase! Anyone has seen a suitcase!" I yelled out to the other police men and started climbing down the stairs

"there wasn't any suitcase Hiccup " Astrid huffed as she crossed her arms.
"they're killings all of them, I don't know how but they're serial killings "

We've got a serial killer, yes! Love those. There's always something to look forward too.

"come on, where is her suitcase! Did she eat it! " I joked

"someone else was here, they took the case. The killer must have driven here. Forgot the case was in the car!

Oh... Ohhhhh!

Serial killers, always hard. You have to wait for them to make a mistake. Well we have our mistake! "
I exclaimed as i opened the door out.

"what's the mistake? " Y/N yelled

"PINK!!! "