Some former prisoners who say they were wrongly convicted are putting pressure on the New York City Police Department and the Brooklyn district attorney to make reforms and review old cases.
A group gathered on the steps of City Hall Wednesday to tell their stories and demand change.
The group wants new Brooklyn District Attorney Ken Thompson to speed up an investigation into convictions made under Detective Louis Scarcella.
Several men have been released from prison after it was found that Scarcella built his cases on false confessions and fake witness testimony.
"Lies, testifying in court, coercing witnesses. These are all things that was involved in my case," said Sundhe Moses, who spent 18 years in prison. "I ultimately served 18-and-a-half years."
"I feel violated, humiliated," said Derrick Hamilton, who spent 21 years in prison. "Most of all, I stand here today without my mother and father, who died throughout my incarceration."
"Right now, I'm on life parole," said Kevin Smith, who spend 27 years in prison. "My daughter lives in Long Island. I can't go see my grandkids and my daughter because I have to get permission. I can't vote. All I'm asking for is my true citizenship back."
The activists are also asking the NYPD to videotape all interviews with suspects and change the way lineups are done to prevent witnesses from misidentifying suspects.