CARROLLTON, Texas (CBSDFW.COM) – A Richardson man who was arrested for fatally shooting his co-worker outside his Carrollton home was today convicted of murder.

Tonniel Marquis Brown was sentenced to life in prison for the death of 56-year-old Jose Ruiz, who was shot to death when he left his apartment.

It happened shortly before 5:45 a.m. Tuesday, January 23, 2018 at 3420 Country Square Drive.

Investigators said Brown’s motive was a workplace dispute between the two men the day before the shooting.

Tonniel Marquis Brown (credit: Carrollton Police Department)