A Florida man has been charged with beating his sleeping father to death with a spare boat alternator while 66 miles offshore on a fishing trip, according to reports.

Casey Hickok, 32, was arrested on a second-degree murder charge on Tuesday, The Naples Daily News reported.

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If convicted, WWSB reported, he'll face a maximum penalty of life in federal prison in the death of his father, Robert, 74, aboard a commercial fishing vessel.

Multiple reports suggested the son may have been triggered by past abuse.

Casey claimed Robert raped him several times when he was a child and had started “messing with” him before the latest events unfolded.

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The Bradenton Herald reported that according to jail records, the son has previous arrests on charges of kidnapping, possession of a controlled substance, assault, possession of cocaine and violation of a protection injunction. He also previously served two terms in prison related to aiding an escape and aggravated assault.