A Leilani Estates resident captured on cellphone video in May firing gunshots over the head of another resident pleaded guilty Monday in U.S. District Court to being a felon in possession of a firearm.

John Hubbard, 62, faces a maximum 10-year prison term at sentencing in June. In exchange for his guilty plea, the government agreed to recommend letting him serve his federal sentence at the same time he serves any state sentence he might get for the same incident.

Hawaii County prosecutors charged Hubbard with robbery, using a firearm to commit the robbery, carrying a firearm without a permit, two counts of reckless endangering and five counts of terroristic threatening. He is scheduled to stand trial in state court April 30.

Authorities recovered ammunition for a revolver and a rifle from Hubbard’s pickup truck the day after the May 29 incident but did not recover any firearms.

Assistant U.S. Attorney Marshall Silverberg said Monday that experts from the U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives reviewed the video and concluded that Hubbard was firing a .38-caliber revolver.

Hubbard admits that the gun was a Colt 38 revolver that was buried in lava that later overran his home. He said he believed then and still believes the people he confronted were looters who intended to do him harm.

He has a 1976 felony narcotics conviction in Kentucky and a 1986 felony firearm possession conviction in Oregon.