The Parker County Sheriff’s Criminal Investigations Division, in collaboration with the Texas Rangers, has arrested three men in connection with the April 20, 2025, homicides of Tiffany Ann Williams, 44; David Wayne Walker, 42; and Robbie Allen Head, 55, at a residence in southern Parker County.
The suspects are identified as:
-
Barrett Copeland, 19
-
Dennis Craig Alexander, 45
-
Trin Lawrence McKnight, 27
All three have been charged with capital murder and are currently held at the Parker County Jail on $1,000,000 bond each.
Copeland faces an additional charge of burglary of a habitation, with a bond of $50,000.
McKnight was also arrested on an outstanding warrant for possession of a controlled substance out of Tarrant County.
Parker County Sheriff Russ Authier noted that the investigation remains ongoing and extended thanks to the Texas Rangers, CID investigators, Special Crimes Unit, and the Patrol Division for their collective efforts.
