FALL RIVER, Mass. — A Massachusetts state trooper has taken the stand in the murder trial of former New England Patriots tight end Aaron Hernandez.

Trooper John Conron was on a team that recovered video surveillance from Hernandez’s home. He began testifying Thursday.

Hernandez is charged in the June 2013 death of Odin Lloyd, who was dating the sister of Hernandez’s fiancee.

Hernandez’s lawyers have tried to poke holes in the state’s case by going after how police handled evidence and questioning their almost immediate focus on Hernandez. Lloyd’s body was found in an industrial park near Hernandez’s home.

On Wednesday, his lawyers focused on how police handled a shell casing and blue bubble gum found in a car that Hernandez had rented.

Prosecutors say Hernandez drove Lloyd in the car to the site where he was killed.