Zackkary D. Wilcox is being held in the Ada County Jail on a felony charge of lewd conduct after Boise police say he had illegal sexual contact with a teenager several times over the last month.

Boise police began their investigation into the 19-year-old Wilcox — who is already registered as a juvenile sex offender with the Idaho State Police for an unrelated case — just after midnight Saturday after getting a phone call from a third party.

Police found Wilcox a short time later at a different home. By 3 a.m. Sunday, detectives gathered enough evidence that Wilcox had illegal sexual contact with the teen victim at several places in the city over the last month to arrest him on the lewd conduct charge, according to reports.

Police reports do not define the relationship between Wilcox and the teen but do say they are well known to each other and do not live in the same home. Police say the victim is under the age of 16.

Wilcox is registered as a sex offender after being convicted as a juvenile on a charge of lewd conduct in Kootenai County in 2011, according to ISP records.

Wilcox will make his initial court appearance on the Ada County charge Monday afternoon.

The crime of lewd conduct is punishable by up to life in prison.