The Los Angeles Times is reporting that a 26-year-old man who wore a SLAYER shirt when he killed four members of a south Whittier, CA family was found guilty Tuesday of murder after forensic evidence tied him to the crime scene.

According to the paper, SLAYER is a heavy metal band "known for lyrics about violence and death." Nearly a decade ago, three San Luis Obispo youths pleaded guilty to killing a 15-year-old girl, saying SLAYER's songs incited them to commit the crime. The girl's parents sued the band, but a judge threw out the lawsuit in 2001, ruling that the band's music is protected by the 1st Amendment.

The motive behind the latest massacre may never be known, prosecutors said. But shortly before Alfonso Ignacio Morales committed the crime, a daughter in the family had spurned his romantic overtures, and Morales returned to their house with a knife, they said.

Victims Miguel Ruiz; his wife, Maritza Trejo; their 8-year-old daughter, Jasmine; and Ruiz's grandmother, Ana Martinez, were known as part of a quiet, hard-working family. Their house was ransacked and the throats of Ruiz and Martinez were slit. Trejo was stabbed at least 30 times. Jasmine was sexually assaulted and drowned in a bathtub.

"There was blood in almost every room in the house," Los Angeles County Deputy Dist. Atty. Alva Lin said.

Read more at the Los Angeles Times.