Petaluma man sent to prison for 15 years to life in child sex abuse case

The investigation began after the child told his mother about the abuse by Brandon Bryon Cooper, 30, who was found guilty last month.|

A Petaluma man was sentenced to 15 years to life in prison plus an additional nine years on Monday for sexually abusing a young boy.

Brandon Bryon Cooper, 30, received the sentence after being found guilty of three felonies in court last March, the Sonoma County District Attorney’s Office said in a statement.

The felonies were listed on the Sonoma County Superior Court website as performing sex acts with a child 10 years old or younger, committing lewd acts with a child and attempting to commit lewd acts with a child.

Investigators opened their case against Cooper after the victim, now 11, told his mother that Cooper had sexually assaulted him a few years before, prosecutors said. Cooper was a family friend who had frequent access to the child, according to the district attorney’s office statement.

Cooper was previously convicted of sexual battery after forcing a friend’s developmentally delayed relative to preform oral sex on him, prosecutors said.

You can reach Staff Writer Nashelly Chavez at 707-521-5203 or

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