Civil rights leaders and members of the community are calling on U.S. Justice Department to investigate deadly shootings involving the Houston police officers.

At a press conference on Wednesday afternoon, community members expressed their concerns and asked for more accountability of law enforcement when it comes to officer involved shootings.

"What we're seeing is the Houston Police Department has gotten no better, but worse when it comes to citizen involved shootings in a 10 year period," said Randall Kallinen with the Greater Houston Coalition For Justice.

One of those cases that spawned criticism was the shooting death of Brian Claunch.

HPD officer Matthew Marin shot and killed Claunch in September 2012, after the mentally ill man threatened his partner with a ball point pen, police have said.

A Harris County grand jury decided not to indict the officer.

Also, the recently released autopsy report of Rufino Lara indicated he was unarmed holding a beer can when was fatally shot by an HPD officer in July 2012.

Last year, Houston Police Chief Charles McClelland said he asked the U.S. Justice Department to review Claunch's shooting and two other cases.