CORAL SPRINGS, Fla. (AP) — Two teenage brothers were home alone in their suburban neighborhood when an argument over loud music spiraled out of control, police said, leaving one brother dead from a knife to the chest and the other accused of killing him.

William Gorzynski, 15, was being held in juvenile custody on suspicion of second-degree murder in the Monday death of 14-year-old Matthew Gorzynski.

According to police in Coral Springs, about 45 miles north of Miami, Matthew was playing music on a home computer. William was watching television nearby and complained the volume was too loud. He told him to turn it down. Matthew refused. The two yelled at each other, then fought.

Then William went to the kitchen, grabbed a 7-inch knife and stabbed his brother in the upper left chest, Sgt. Joe McHugh said.

William called 911 soon after and told the dispatcher he had just stabbed his brother.