Deputies: 3 days of interviews have found no motive in Florida shooting spree that left 3 dead

Florida investigators say they still haven't determined why a former trucking company employee went on a weekend shooting rampage that left him and two others dead.

Union County sheriff's Lt. Lyn Williams said Monday that three days of interviews with people who knew 72-year-old Hubert Allen Jr. haven't turned up a motive.

On Saturday, Allen drove to a location owned by his former boss, Marvin Pritchett. He shot and killed former co-worker Rolando Gonzalez-Delgado and then went a short distance and killed Pritchett.

Minutes later, Allen pulled over where another former co-worker was driving a farm tractor, exchanged words with him and fired a shotgun. That victim survived, as did a man Allen shot at the trucking company's headquarters.

Allen then went home and fatally shot himself.