HARTINGTON, Neb. -- A Louisiana man accused of shooting a co-worker appeared in court and waived his right to a speedy trial in Cedar District court Monday morning.

David Phillips appeared in court after being a suspect following the shooting death of Israel Matos-Colon at the beginning of March.

He is accused of three felonies including second degree murder and two fire arms charges.

Law enforcement officials said they believe a workplace argument began between the suspect and victim, leading to the shooting.

Phillips filed a written not-guilty plea in lieu of a hearing in late March.

Phillips next court appearance is set for Oct. 23 for pre-trial at 10:30 a.m.