The family of John Hernandez filed a civil lawsuit against Terry and Chauna Thompson on Monday.
The couple were indicted for murder in the fatal beating outside a Denny's in Sheldon.
Terry is the man seen on video holding Hernandez, 24, in a choke hold. Terry's wife, a Harris County Sheriff's deputy, helped restrain the victim and didn't stop her husband from choking him.
The medical examiner ruled Hernandez, 24, died from strangulation and chest compression.
Plaintiffs in the lawsuit are the victim's parents, wife and 3-year-old daughter. Court documents showed the family is seeking over $1 million in damages.
According to the family's lawyer, the lawsuit reveals new facts not previously released to the public.
A press conference regarding the lawsuit will be held on Tuesday, June 13 at 10:30 a.m.