One of the 170 bikers arrested after Sunday’s deadly shootout between rival biker gangs in Waco, Texas, is a former San Antonio Police Department detective. Martin Lewis, 62, retired in 2004 after 32 years with the SAPD and is reportedly a member of the Bandidos Motorcycle Club.

The nine bikers killed in Sunday’s gang shootout in Waco, Texas, have reportedly been identified. Meanwhile, police have offered a new theory for what might have triggered the deadly brawl: a run over foot.

Sunday’s deadly shootout between rival biker gangs in front of a Waco restaurant may have first begun, police believe, with an argument over a parking space.