Updated

An 18-year-old admitted Tuesday that he killed two teenage brothers inside a mobile home they shared with their mothers in northwest Ohio.

Michael Fay pleaded guilty to two counts of aggravated murder in a Putnam County court and faces up to life in prison when he's sentenced next month.

Fay didn't make a statement during the brief hearing. He had been scheduled to go on trial in November.

Fay and the brothers had gotten into an argument and Fay drove to a storage unit owned by his mother and retrieved a gun, said Todd Schroeder, an assistant county prosecutor.

Fay shot 14-year-old Blaine Romes while he was sleeping on a couch and then shot Blake Romes, 17, in his bedroom, Schroeder said.

He and the teens were named in an Amber Alert in May after the Romes' mother discovered a gun and blood inside a trailer home where all three boys lived with their mothers.

The mother frantically called 911 on May 9, telling authorities to "please hurry."

Authorities at first believed that all three teens had been kidnapped after finding a bloody trail throughout the mobile home to the back door and tire tracks leading away from the trailer.

But only the Romes brothers were found dead.

Blaine was supposed to join his classmates on an eighth-grade class trip to Washington the morning he disappeared. His mother told a 911 dispatcher she left work because he was not answering his phone that morning.

Police found Fay later that afternoon at a gas station in Columbus, about 120 miles southeast of the trailer park in Ottawa.

He told officers that the Romes brothers were dead and pointed authorities to their bodies, the Putnam County Sheriff's Office said.