37 year-old Isaac David Cayer appeared in Missoula Justice Court on Monday, charged with felony sexual abuse of children, possession of material.

Deputy Missoula County Attorney Ryan Mickelson said the investigation began when Missoula County Sheriff’s deputies were contacted about an abandoned cell phone that contained images of child pornography.

Court records indicate that the phone belonged to Cayer. When investigators contacted him in August of 2017, Cayer claimed the images had been sent to him by a female friend and may have been part of a federal investigation into a child prostitution ring in Hawaii.

However, when investigators with the sheriff’s office contacted the FBI, they had not had any contact with Cayer or his friend regarding the pornographic images.

Cayer was extradited from Arizona and booked into the Missoula County Jail just before 2:00 p.m. on Monday, in time for his initial justice court appearance.

His bail was set at $50,000.