You are absolutely correct! The blackened is Mahiru Kozihmi!

As Mahiru drops to her knees, everyone stares in shock.. "Why Mahiru?" you say, "I thought you were responsible enough..." As everyone tries to deny the fact Mahiru shouts at the top of her lungs.. "This ISN'T THE FIRST TIME I HAVE KILLED SOMEONE!" Everyone stares in horror and Fuyuhiko screams "Was it you.... DID YOU KILL MY LITTE SISTER!!!!!" He didn't hold back then Mahiru shouted "I HAD NO CHOICE! SHE MADE ME!!" No one had ever seen Mahiru so terrified then in front of monokuma she spoke," Just execute me all ready I deserve to die anyways."

We were all shocked to see the ultimate photographer so shocked but before we knew it she had all ready fell into despair. "Why? Why did you kill Peko?" "Because she was going to kill Mikan. "Me and Mikan are friends you know!" Then Monokuma comes in with the dreaded words.

I HAVE A VERY SPECIAL PUNISHMENT FOR THE ULTIMATE PHOTOTOGORPHER MAHIRU KOZIHMI!

LETS GIVE IT EVERYTHING WE HAVE GOT.. ITS PUNISHMENT TIME!

Mahiru softly spoke with a tear in her eye thank you as monokuma dragged her away...

Mahiru was put into a deserted ruin and a tiny photo album with her name on the front. As she looks through the pages a white hand behind here starts to grab her by the neck. As she goes further into the pages she sees a dead her lying on the ground. As this makes no sense to Mahiru her camera starts the shoot while she tries to take the camera off the white hand has grown stronger around her neck. One minute later she has died from suffocation. Everyone including you stares in despair as the two strongest members are gone like dog eat dog.