OMAHA, Neb. (AP) — Omaha Police Chief Todd Schmaderer says a robbery suspect killed this week by police was shot in the back and that internal affairs and grand jury investigations will determine whether the shooting was justified.

Danny Elrod died Monday night after being shot by Officer Alvin Lugod. Authorities later determined that Elrod was unarmed.

Schmaderer detailed the events of the shooting during a press conference Thursday. The chief says Elrod robbed a nearby store of money, then refused police commands to show his hands and get on the ground. Schmaderer said Elrod repeatedly told officers on the scene that he had a gun and repeatedly reached for his waistband, as though he had a weapon.

Schmaderer said Elrod was shot as he turned and grabbed the top of a fence.