Detectives are asking for the public's help putting together a timeline surrounding Deputy Wallace's death.

Stanislaus County Sheriff's Deputy Dennis Wallace was shot twice in the head Sunday morning after. David Machado is accused of shooting Wallace execution style.

As the investigation of Wallace’s death continues, Stanislaus County Sheriff’s Detectives are asking for the public’s help establishing a timeline for everywhere the Machado may have been before and after the shooting at the Fox Grove Fishing Access near Hughson.

Detectives are looking to speak with anyone who contact with Machado.

Anyone who believes they may have seen or spoken with Machado on Sunday, Nov. 13, or had dealings with him in the past, is asked to contact Sheriff’s Detective Josh Sandoval at 209-525-7073.