Story highlights Deputy Dennis Wallace, a 20-year veteran of the department, dies after being shot in the head

Police catch the suspect, David Machado, 36, after a manhunt on Sunday

(CNN) Police have arrested a man they say fatally shot a police officer in central California on Sunday, according to the Stanislaus County Sheriff's Department.

Dennis Wallace, a 20-year veteran of the department, was shot twice "in direct contact with his head" while initiating an investigation of a suspicious van at Fox Grove Fishing Access, Stanislaus County Sheriff Adam Christianson said.

Wallace was 53 years old. The sheriff said Wallace "was calling in the stolen car to dispatch and then everything went silent. When more officers arrived at the scene he was found dead from two close-range gunshots to the head."

Manhunt leads to suspect arrest

Police caught the suspect, David Machado, 36, after a manhunt on Sunday.

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