PERRY HALL, Md. (WJZ/AP)A Baltimore County student opens fire on the first day of school at Perry Hall High School, striking a classmate in the back. His victim remains hospitalized. WJZ continues to uncover new information about the troubled background of the 15-year-old accused gunman.

Mike Hellgren has the latest developments.

The accused teenagers defense is starting to trickle out.

Robert Gladden Jr. remains in custody. New pictures show the teen in the weeks before police say he brought a gun to Perry Hall High Schools cafeteria and shot his classmate, 17-year-old Daniel Borowy, in the back.

There are concerns that warning signs were missed. Fellow students say Gladden went to guidance counselors for help.

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On his Facebook page, which is open to the public, he listed Eric Harris and Dylan Klebold as inspirations. They are the teenagers behind the Columbine High School massacre, killing 13 classmates and injuring 24 others in 1999.

Borowys father said Thursday he wants parents to be aware of what their children say on social media and young people to tell an adult if anyone makes a sinister statement.

Robert Gladden posted on Facebook before Mondays shooting at Perry Hall High School: First day of school, last day of my life.

In an interview Thursday with The Associated Press, Milton Borowy asked parents to be friends with their child on social media sites and wake up to what the social media shows you. He begged teenagers to act if theyre concerned about what someone says.

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Accused Perry Hall HS Gunman’s Facebook Page Lists Columbine Shooters As Inspiration