BALTIMORE (WJZ) — The hunt is on for public enemy number one. Baltimore City police say he’s wanted for shooting two senior citizens.

Ava-joye Burnett with what we’re learning about the suspect’s violent past.

Public enemy number one is no stranger to police. He has a long rap sheet. Now he’s accused of shooting a 92-year-old woman and her 82-year-old brother.

Carl Cooper, 36, is public enemy number one. What he’s accused of doing made headlines this week.

Police say he’s the trigger man who shot 92-year-old Martha Gillard and her 82-year-old brother, Hogan McGill, on Monday.

The innocent victims were simply walking in the Walbrook Junction area of West Baltimore.

“I think it’s the saddest thing. I think it is so sad. There’s no words to describe it, really,” said Sherwood Claiborne.

WJZ has obtained court documents showing Cooper has a violent past.

In 1995, he pleaded guilty to assault with intent to murder, rape and robbery. He was also indicted in 2000 on first-degree assault and attempted first-degree murder charges.

“We’re going to flood the community with your images, we’re going to flood the community by constantly repeating your name and we’re going to get the community involved in your capture,” said Commissioner Kevin Davis, Baltimore City Police Department.

First, we saw video of the suspect running away from the scene, now police want to get his name out there.

“I hope that anybody who knows him will turn him in because I’m sure everybody wants justice,” said Deborah Christopher.

As police plead for the public’s help, they’re also reminding folks that Cooper could be armed and dangerous.

“I hope they do something about it. I hope he does get jail time because it could have been my mother. It could have been my son, my kids,” said Tmeka Corsey.

There is a $12,000 reward for any information that leads to an arrest and conviction in the case.

Police say the shooting was drug-related, but the elderly siblings were not the intended targets.