Ricardo Portillo, a Salt Lake City soccer referee, passed away on Saturday after falling into a coma while being treated for what was thought to be minor injuries following an attack on the soccer field, the Associated Press reports. Prior to his death, the 46-year-old referee was allegedly punched in the head by a 17-year-old player on April 27 after penalizing the boy with a yellow card during a game. Portillo died as the result of brain swelling, AP reports.

The name of player has been withheld because he's a juvenile. The teen was arrested two days after the alleged attack and charged with aggravated assault. He faces formal charges this week, when additional charges will be weighed in connection to Portillo's death.