MADISON, Wis. (AP) -- A University of Wisconsin student alleged that an athletic department official grabbed his crotch at an alcohol-fueled party during the football team's trip to the Rose Bowl, according to an independent report released by the school on Tuesday night.

The report says the student alleges former senior associate athletic director John Chadima put his hand down the student's pants at the end of a party in Chadima's suite at a Los Angeles hotel on Dec. 31.

The student -- identified only as John Doe in the report -- said he was "shocked and frightened" and slapped Chadima's hand away.

Chadima was put on administrative leave on Jan. 6 and resigned the same day. He previously had issued an apology for a "lapse in judgment," and issued another statement through his attorney Tuesday.

"I make no excuses and have come to the realization that over the past few months, alcohol had controlled and consumed my life," Chadima said. "I am taking steps to correct that problem in my life at this time. I will take full responsibility for my lack of judgment and actions that evening."

The report said its findings were based on interviews with 23 people, including students and professional staff -- but they were "unable to arrange an interview" with Badgers football coach Bret Bielema.

Three student employees of the athletic department declined to be interviewed.

The report also reviewed information from Chadima's office computer and school-issued cell phone.

Chadima declined to speak with the panel.

The report said Chadima hosted a bowl game party for staff and student employees for at least the past four years. The most recent party began Dec. 30 and lasted into the early morning hours of Dec. 31, at Chadima's hotel suite. According to the report, Chadima provided "alcohol, beer and mixers" and guests were invited to serve themselves. Some of the guests were under age 21.

Somewhere between 1:30 and 2 a.m., the alleged victim was leaving along with the last few people left at the party when he said Chadima asked him to "stay here and have a drink with me." The alleged victim said he and Chadima both had several more drinks and "probably were intoxicated," but were coherent and in control of their physical movements.

According to the report, Chadima then said he thought the student was gay, and said some of the other student employees thought he was gay. The student said it made him "uncomfortable and defensive."

The student then said Chadima reached over and removed the student's belt, putting his hands inside the student's pants and touching his genitals. The student said he slapped Chadima's hand away and swore at him.

At that point, the student said Chadima said he thought the student liked it, asking "What are you going to do about it?" and saying "I could have you fired."

The student said he quickly left the room, and Chadima seemed to want to gloss over the incident as "just joking around."