ST. PAUL — A former custodian for St. Paul Public Schools is accused of peeking underneath a bathroom stall and smiling at a male student in February.

Sixty-two-year-old Walter Happel of Newport is charged in Ramsey County with one count of surreptitious interference with privacy.

Happel was charged for a Feb. 20 incident at Linwood Monroe Arts Plus School.

During their investigation, authorities learned that Happel kept a room in the building that contained topical intensifying gel, energy capsules and a bottle of testosterone.

The Star Tribune reports the bathroom incident is the latest in a number of alleged transgressions with young boys that go back as far as 2003.

A school district spokeswoman says the district is cooperating with police. Happel had no comment to KSTP-TV as he left jail Thursday.