UPDATE: The State Attorney's Office officially filed charges on September 7th. Mark McDonald was charged with DUI, possession of cocaine and possession of paraphrenalia.
Contact 5 has uncovered new information in the case of a Palm Beach County Sheriff's Office employee arrested last month for possession of cocaine and DUI.
Mark McDonald has been with PBSO since 1987, but he's now a former PBSO forensic unit manager.
A PBSO spokesperson tells Contact 5 he retired one week after his arrest in late July of this year.
A look at McDonald's personnel file shows this wasn't the first time he got a DUI while at the agency.
Mark McDonald was arrested on suspicion of DUI on November 17, 2013 in Port St. Lucie, after crashing his unmarked PBSO squad car into a tree at 3:29 a.m.
Port Saint Lucie Police and Florida Highway Patrol investigated the incident.
In their report, FHP troopers write they made contact with McDonald while "he was slumped over the hood of a Port St. Lucie patrol vehicle."
Records show McDonald told troopers "he had a few to drink."
A judge found him guilty of DUI and internal affairs records show PBSO suspended McDonald and took away his department vehicle.
Contact 5 obtained a copy of the letter McDonald sent to his supervisor a week after his arrest, announcing his "retirement."
It says in part: "After thirty years of dedicated service, I have decided to retire to spend more time with my family."
McDonald was arrested in July after crashing his truck into a gatehouse. Deputies found cocaine in McDonald's pocket.
The state attorney's office failed to file formal charges last month, but when asked if the case was dismissed or charges were coming, a spokesperson just told us "it was still open."