T.J Lane the teenager who opened fired at Chardon High School in Ohio on Monday, will be tried as an adult, prosecutors told ABC News.

The 17-year-old admitted to carrying out the shooting that killed three and injured two. He told prosecutors that he chose his targets randomly.

[Lane] confessed to taking the pistol and admitted he went into the cafeteria and shot 10 rounds, prosecutor David Joyce told ABC News. This is not about bullying. This is not about drugs. This is someone who is not well, he added.

Lane allegedly entered Chardon High School with a 22 caliber handgun and knife. He shot four students in the cafeteria and one in the hallway before leaving the school.

Demetrius Hewlin and Russell Kind Jr were among two of Lane's victims who were reported dead  at MetroHealth Medical Center near Cleveland on Tuesday. Daniel Parmertor was the first to die just hours after the shooting Monday.

Two victims still remain in the hospital. One 17-year-old boy is in critical condition, while an 18-year-old girl is in serious condition, according to USA Today.

In court Lane sat with his head bowed and didn't say anything apart from Yes sir when addressed by Judge Timothy Grendell. He will be held in detention during the proceedings.

Hundreds of people gathered outside a church in Chardon, on Tuesday night, to pay tribute to the lives of victims in the shooting. Classes will resume at the high school on Friday, according to ABC News.

Lane's Facebook Page Gave Clues

Postings on Lane's Facebook page hints that the teen is troubled. In a poetic rant he wrote, In a quaint lonely town, (where there) sits a man with a frown (who) longed for only one thing, the world to bow at his feet, he wrote

Feel death, not just mocking you. Not just stalking you but inside of you, he writes. Wriggle and writhe. Feel smaller beneath my might. Seizure in the Pestilence that is my scythe. Die, all of you.

After the shooting Lane's friend left this post on his page: I wanted so bad to try and help you but I could see in your eyes you didn't care anymore. I'm sorry buddy.