MEMPHIS, Tenn. -- The parents of Tyre Nichols spoke Tuesday in Memphis, not just about the death of their son, but to seek justice for another suffering family. RowVaughn and Rodney Wells joined the family of Ronald Greene and their attorney Ben Crump for a news conference in front of the National Civil Rights Museum on Tuesday. "Say his name, Ronald Greene. Say his name, Ronald Greene," one supporter said. Greene died in May 2019 after being arrested by Louisiana State Troopers. The case gained national attention after body cam video showed white troopers beating Greene and dragging him. The federal investigation remains open regarding Greene's case. "My son was killed in 2019. You have so many others that came afterwards," said Mona Hardin, Greene's mother. "And this is not stopping. You got that so-called oath to protect and serve your community, not to go out there and butcher innocent black and brown citizens." ‘Where’s Ronald Greene’s justice?’: 5 years on, feds still silent on Black motorist’s deadly arrest "I wanted to know why there wasn't a civil rights case for him," RowVaughn Wells said. Attorney Ben Crump said both cases resulted in black men dying during what police say was a traffic stop. "We have an apples-to-apples comparison practically with Tyre Nichols in Memphis, Tennessee and Ronald Greene in Louisiana," Crump said. "Because both of them (were) on camera." Ronald Greene. His family wants federal charges against the troopers like the swift charges made in the Tyre Nichols case. "I am so grateful to Tyre Nichols, parents, RowVaughn Wells and Rodney Wells, his mother and father for using their platform and their attention," Crump said. It comes as the fight for justice in the Tyre Nichols case continues. Tyre Nichols trial put police training in spotlight Now Tadarrius Bean and Justin Smith, former officers convicted of obstruction in Nichols' death, want their convictions acquitted. Demetrius Haley is pushing to get out on bond. Desmond Mills, another officer charged in Nichols' death asked for his sentencing date to be delayed until February 2025. "For them to file acquittals it's like a slap in the face to a degree because they're not respecting what the jury set forth," RowVaughn Wells said. "The jury said they were guilty for that particular charge, so they should accept that." In the meantime, the families of Nichols and Greene will continue their fight for justice in the cases of their loved ones.