The father of a high school football star fatally stabbed hours after graduation faces criminal charges for his role in initiating the altercation which cost his son’s life.

During his arraignment June 29, Andre Muller stood in a Bronx courtroom wearing a dress shirt drenched in his son’s blood. He is charged with assault, menacing, harassment and criminal possession of a weapon for attacking two parking lot attendants who later stabbed his son. He was released on $10,000 bail, and later attended a vigil with 250 other mourners.

“They killed my boy,” he said fighting back tears, according to The New York Daily News. “He was a good kid. I’m going to miss him every day.”

His 19-year-old son, Isayah Muller, a star running back for Harry S. Truman High School in the Bronx, was stabbed June 28 after getting into a fight with two parking attendants who his father had accused of stealing a $200 bottle of cologne from his car.

Andre Muller reportedly realized the cologne was missing from the side door of his vehicle after the family had a celebratory dinner following the commencement ceremony.

According to reports, the elder Muller drove back to the lot where he had parked during the ceremony and confronted parking attendants Ramon Hernandez, 51, and Joselin Encarnacion, 32, for stealing the cologne.

A fight ensued, with security camera footage showing Andre Muller striking one of the attendants with a snow shovel. The video also shows the younger Muller pummeling the attendants, but did not capture the stabbing, according to the Daily News.

One of the attendants said he plunged a homemade knife into the teen’s chest and side in self-defense.

After the stabbing, Andre Muller rushed Isayah to a nearby clinic. The teen was later transferred to an area hospital, where he was pronounced dead.

Though they were questioned by police, neither attendant was criminally charged.

“What a tragedy. Muller was the aggressor,” Police Commissioner Raymond Kelly told New York City Fox affiliate WNYW.

According to several news outlets, Andre Muller is an ex-con who spent time in prison for drug dealing and robbery.

Isayah Muller led his school to their first Public School Athletic League Bowl championship last November and had planned to attend Nassau Community College in Long Island in the fall, according to the Associated Press.

“He was a loyal kid. If you were ever in trouble, he had your back,” teammate Xavier Hamilton told The New York Post. “That was the kind of person he was.”

Lineman Nico Almodovar, who graduated with Isayah, added, “Knowing him and how he loved his family, he backed up his father.”