Quenton M. Brown, the father of Boston Celtics star guard Jaylen Brown, was booked into Clark County Detention Center in Las Vegas, Thursday, for attempted murder after a parking lot dispute turned violent.

According to several news outlets, Brown, a former boxer who goes by his middle name Marselles, began arguing with another man over a “door ding” in a parking lot. NBC affiliate 3 News reported that the “the suspect stabbed the victim in the stomach.”

Brown allegedly fled the scene but was later arrested and taken into custody. The victim, reported to be a youth football coach, was reported to be in critical condition after he was transported to a local hospital to undergo emergency surgery, according to TMZ.

Doctors told Las Vegas police that the victim was suffering from stab wounds to his back, clavicle, hands, and also broke a rib during the encounter. The victim’s girlfriend claims that they were parked in the lot when Brown’s SUV pulled next to them. As the passenger exited the vehicle, the SUV’s car door hit their car.

After the two men argued, the girlfriend of the victim claims that Brown followed the couple and eventually “swung his arm in a straight stabbing motion and struck [the boyfriend] in his back,” the girlfriend said, according to police.

Another witness told police that she saw Brown swing his knife at least “25 times.”

Police later found Brown in the passenger seat of the car, with “abrasions to his knees and was bleeding from the face,” the New York Post reports. 

“He spontaneously uttered that this was all over a door ding without being asked any questions by Patrol officers,” the police report states.

Brown is expected to appear in court, Thursday.

The Post notes that during his boxing career, Brown had a 33-18-1 record and made his professional debut in 1989. 

TMZ reported that NBA champion Jaylen Brown “doesn’t have a close relationship with his father and was unaware of the arrest or incident.”