After more than a year in custody, a repeat DUI offender admitted gross vehicular manslaughter, resulting from a head-on collision in which he killed a man on a motorcycle.

Brian Joseph Webb II, now 35, was driving the wrong way on a major freeway in San Diego County when he collided with 60-year-old Robin Vaughan, who died at the scene.

Webb admitted he was drunk when he drove his 2003 Dodge pickup truck into the man riding a Harley-Davidson motorcycle, on a Saturday afternoon, July 28, 2012.

The collision occurred a little after noon, on Interstate 15, just south of Via Rancho Parkway in the Escondido area.

California Highway Patrol reported open containers of alcohol were found in Webb’s truck. Webb was driving with a suspended license, and was out on bail for two prior DUI arrests, according to a prosecutor.

Webb was arrested for DUI in Riverside County on June 22, 2012 and the following month on July 5, he was arrested for DUI in San Diego County, according to prosecutor Kelly Mok.

Webb has four other DUI arrests in Riverside and San Diego Counties, in the years 2000, 2004, and 2007, the prosecutor said.

The prosecutor had filed a murder charge against Webb for his most recent offense, based on the fact that his multiple previous DUI convictions proved he had been warned about how dangerous his behavior was.

Brian Joseph Webb II expects to be sentenced to 15-years-to-life in San Diego’s North County Superior Courthouse, on October 16, 2013.