St. Louis County YMCA coach accused of sex crimes against student

A St. Louis County YMCA coach is accused of sex crimes against a student.
Published: Jun. 11, 2025 at 4:42 PM CDT
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ST. LOUIS, Mo. (First Alert 4) - A St. Louis County YMCA coach is accused of sex crimes against a student.

Police said a victim came forward stating that in 2013, when she was 13 years old, Marco Zomphier sexually abused her while he was her coach at the YMCA. The victim said she came forward now because she learned of another victim.

Marco Zomphier, is accused of sex crimes in St. Louis County and Jefferson County.
Marco Zomphier, is accused of sex crimes in St. Louis County and Jefferson County.(Jefferson County Sheriff's Department)

Police said that Zomphier, 31, made some issions to the acts. He has been charged with two counts of first-degree statutory sodomy and sexual with a student. His cash-only bond was set at $250,000.

Zomphier is currently in custody in Jefferson County, where he is charged with first-degree statutory rape, first-degre statutory sodomy, enticement of a child, first-degree endangering the welfare of a child and sexual with a student.

Charging documents in Jefferson County state that Zomphier was a cheer coach at the time of the crimes against a 13-year-old girl.

St. Louis County police believe there are additional victims. Anyone who believes they were victimized should call the St. Louis County Police Department at 314-615-5400.