A Butler man accused of sexually assaulting a 17-year-old girl with autism pleaded guilty Tuesday to a felony charge of aggravated indecent assault.

Ivan Cumba, 54, entered his plea as part of an agreement through a Spanish interpreter during a brief hearing in Butler County Common Pleas Court.

Assistant District Attorney Ben Simon said the incident took place April 26, 2025, and the agreed-upon sentence is 12 months minus one day to 24 months minus two days in Butler County Prison, followed by three months of house arrest.

Aggravated indecent assault carries a maximum penalty of 10 years in prison and a $25,000 fine.

He said Cumba will have served more than the minimum sentence by the time he is sentenced and will be paroled to serve the three months of house arrest at his sentencing hearing. Cumba has been held in the prison without bail since May 5, 2025.

According to Butler police, Cumba arrived unannounced at a Fourth Avenue home and spoke with a woman he had known for years. While the woman was in a bathroom, Cumba went to awaken a girl sleeping upstairs. The woman reportedly told police Cumba’s behavior was not unusual.

Police said the woman exited the bathroom after a short time, went to the girl’s room and found the door closed, which she said was uncommon. The woman entered the room and saw Cumba sitting on the bed next to the girl while she was asleep.

The woman told police she saw Cumba’s hand under the girl’s blanket inside her underwear before she began shouting at him. The woman was able to get Cumba out of the house before calling 911.

Aggravated indecent assault is a Tier 3 offense under the state Sex Offender and Notification Act, which carries a potential lifetime police registration requirement, Simon said.

Judge Maura Palumbi said she would schedule sentencing after Cumba undergoes a sexually violent predator assessment. The district attorney’s office could schedule a sexually violent predator hearing after the assessment is completed, she said.

The Sex Offender and Notification Act board conducts the assessment. If the board decides a person meets the criteria for classification as a sexually violent predator, the local prosecutor determines if a hearing is needed to decide if the person actually is a sexually violent predator.