Man tries to drill into brother's head during argument, police say 

A San Francisco man will be arraigned Tuesday on charges that he attacked his brother with a cordless power drill during a vicious argument over a busted door lock on Saturday.

Kevin Guerin, 57, who was already facing felony charges in connection to an alleged hate crime assault on Oct. 4, failed in his attempt to drill into his brother’s forehead because the drill bit fell out during the attack, police spokesman Sgt. Michael Andraychak said.

Prosecutors say this attack could have been prevented. For more, go here.

So Guerin allegedly bashed his brother over the head with the drill before letting him go free around 9 a.m., Andraychak said.

The vicious familial attack occurred in the bedroom of a home in the 100 block of Judson Avenue, which is in the Sunnyside neighborhood.

The officer who responded to the fight found the victim’s blood in front of the home. He then learned that the beaten brother had fled to a neighbor’s house and called police.

Before being transported to the hospital, the victim told the officer that Guerin became enraged at him during an argument about a broken lock on a bathroom door.

The victim had apparently asked Guerin not to remove a piece of tape on the bathroom lock, but Guerin didn't heed the request and they argued, Andraychak said.

The victim then decided he might as well fix the lock, so he fetched an electric drill. Guerin apparently became angry that his brother was going to fix the lock, Andraychak said. He grabbed the drill from his brother, pushed him into the master bedroom, forced him on a bed and screamed, “I’m going to kill you!” police said.

“He squeezed the trigger of the drill, and the bit began to spin,” Andraychak said. “The victim struggled as the suspect attempted to put the drill closer to his face and head. Rather fortunately, the bit fell out of the drill.”

Guerin then struck his brother with the drill and let him go. The brother suffered facial injuries that were not life threatening, Andraychak said.   

Police found Guerin hiding out in the garage of the home.

On Monday, the San Francisco district attorney’s office charged Guerin with four felony counts including assault with a deadly weapon. The charges were enhanced due to Guerin’s Oct. 4 assault case.

Guerin remains in custody. His bail will be set today.

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