PLAQUEMINE - Court officials said Cordias Walker pleaded guilty late Monday night to charges he shot and killed someone in Plaquemine during what investigators said was an argument over drugs.

Walker, 22, entered a guilty plea to negligent homicide charges for the death of 17-year-old Wilbert Myles back in November 2012. He received a 5 year sentence with credit for time served.

Investigators said Walker called 911 after the shooting happened and told the dispatcher he'd shot someone in his house. Authorities said Walker claimed self-defense in the shooting and said Myles had another gun pointed at him, but witnesses did not back that story up and investigators did not find a second weapon.

The case took a twist recently when the former lead detective, Chad Fonseca, was arrested on drug charges. Plaquemine Police charged him with drug distribution after undercover deputies said Conseca sold them prescription painkillers in September 2015. A warrant was put out for Conseca's arrest, and he was picked up by law enforcement last week.