A jury has found a Manhattan man guilty of all 17 charges he faced in a child rape case.

Jurors on Thursday delivered the verdict against Alan Ingwersen, 67, who was on trial in Riley County District Court for five counts of rape, four counts of criminal sodomy, and eight counts of aggravated indecent liberties with a child. The victim is a then-15-year-old girl, the daughter of his then-girlfriend.

Ingwersen could receive up to 25 years in prison as Riley County Deputy Attorney Bethany Fields said Ingwersen faces a sentence between 155 months, or nearly 13 years, and 310 months.

The charges stemmed from incidents that happened between Oct. 1, 2019, and Sept. 9, 2020. During that time, the girl testified Ingwersen groped her breasts and buttocks and engaged in sex acts with her. In an initial interview with the police, Ingwersen admitted to some, but not all, of the acts.

The girl was identified by her initials in court, but The Mercury does not name victims of sexual assault.

Jurors reached a verdict after spending most of Thursday afternoon in deliberation.

Lawyers gave their final arguments Thursday morning.

Fields asked the jury to take in the girl’s testimony and to acknowledge that none of these acts were done with consent. Fields asked jurors why the girl would go through all of the interviews, and get sexual assault tests done if what happened was not true or if she had given consent.

Fields said all of the acts occurred at Ingwersen’s home, where the girl and her mother lived. Field said the girl was pinned down in certain instances, and that she always tried to be on the phone with a friend to avoid him. Fields said those things showed she was overcome by force or fear, which is one of the criteria for the crimes.

Defense attorney Barry Clark asked the jury to look at all counts and assess each of them independently.

Clark said the girl’s story had gotten bigger and more detailed as time went on, and there were inconsistencies in her stories. Clark reminded the jury that it must rule on evidence and prove “beyond a reasonable doubt” that Ingwersen was guilty.

Judge Grant Bannister set Ingwersen’s sentencing for 3 p.m. Dec. 6.