The 26-year-old son of Oklahoma Commissioner of Labor Mark Costello faces a first-degree murder charge following the death of his father.
Authorities say that a fight started between Mark Costello and his son, Christian, inside the Braum's located at 11200 N. May around 6:35 p.m. Sunday. According to police, Mark Costello was found inside a vehicle stabbed multiple times despite trying to escape from his attacker.
Christian Costello was detained by individuals that were in the parking lot and he was immediately taken into custody. Police say Christian used a steak knife and stabbed Mark in the head and neck area multiple times. Police say they are investigating where the knife came from at this time.
According to officials, Mark Costello was transported to OU Medical Center and was pronounced dead at the hospital. Christian Costello is currently booked into the Oklahoma County Jail awaiting formal charges.
In 2012, Christian pleaded guilty to assault and battery on a police officer, driving under the influence of a drug and resisting arrest. The charges were deferred and he was ordered to complete community service. Christian was also arrested in 2014 and charged with outraging public decency after a witness observed him with his pants down at St. Eugene's School in The Village. When police arrived on scene, Christian was chewing on bird feathers and grass. Costello pleaded not guilty to the charge.
On Monday, the Costello family said Christian has been struggling with a mental health disease.
Representatives from the Labor Commission says they will have counselors on hand to tend to the emotional needs of Commissioner Costello's staff.
Governor Mary Fallin announced on Twitter Monday that flags on state property will be lowered to half-staff through Friday in honor of Costello's life and service to the people of Oklahoma. Several other lawmakers have released statements following Costello's death.
Mark Costello has served as the Oklahoma Commissioner of Labor since 2010 and was re-elected last year to his second and final term in office. He was born in Bartlesville and was married to his wife for over 30 years and they have five children together.