BOISE, Idaho (AP) — Ada County authorities say a storage unit containing large amounts of child pornography in Montana indicates that a Twills Falls man recently arrested on charges of lewd conduct could have other victims.

Michael Bosse was arrested last week and faces four felony counts of lewd conduct with a minor. The Ada County Sheriff's Office says they began an investigation in March after Cascade County authorities in Montana contacted them about the storage unit.

Officials say Bosse left the pornography, including images of the Ada County victim and others, inside the unit last year. Authorities say Bosse lived in the Boise area until the late 2000s. He then lived in eastern Idaho and Montana before moving to Twin Falls in 2015, where he worked as a school bus driver.