BANGOR — Investigators say a 48-year-old Bradford man charged with murder told police he clubbed a construction company owner with a crowbar, but only after the victim came at him with the metal bar.

An affidavit made public Thursday says Peter Robinson told a dispatcher that 71-year-old David Trask of Hudson came at him with a crowbar after he confronted Trask on Nov. 12 about an unlocked gate on his land. Robinson said he took the crowbar out of Trask’s hands and struck him over the head with it.

The Bangor Daily News says the affidavit also describes a history of disputes between Robinson and Trask over alleged trespassing and a right-of-way issue on Robinson’s land.

A hearing is scheduled Friday to determine if bail will be set for Robinson.