The police department concluded its own criminal investigation into the incident. Oklahoma County District Attorney David Prater announced Oct. 17 he will not file charges against the two police officers.
Slane said Thursday the family learned one of the officers involved is the grandson of the police chief's administrative assistant. The potential conflict of interest worries Howard's family, Slane said.
Citty confirmed Coffey is his assistant's grandson. He said he has fired officers over excessive use of force before, and that interpersonal relationships have not played into those decisions.
“I'll make a decision that's in the best interest of the department,” he said.
FBI spokesman Rick Rains said he the bureau doesn't confirm or deny its ongoing investigations.
It's common practice for police departments to refer cases of this nature to the FBI for a potential investigation, he said.