A Monona man accused of attacking two women and sexually assaulting a third in the UW-Madison area last year changed course Wednesday and decided to plead not guilty by reason of mental disease or defect.

At a Dane County Circuit Court hearing originally set to hear Coleman Chung’s guilty plea, Coleman’s attorney, Anthony Delyea, said discussions between his client and prosecutors had “unraveled,” so Chung decided to change his plea.

Delyea offered no further details at the hearing and declined to comment after it was over.

Chung, 30, was charged earlier this year with four counts of second-degree sexual assault for a Sept. 29 assault of a 17-year-old UW-Madison student passed out on a bench at Gordon Commons.

He was also charged with a felony for allegedly recording the assault on video.

Chung was already on probation for a federal child pornography possession conviction in 2015.

Authorities became aware of the assault after finding deleted videos of it on an iPod touch police seized from Chung, according to the criminal complaint.

The video allegedly showed the woman being groped.

Chung was charged with four felonies — armed robbery, attempted kidnapping, attempted robbery with the use of force and first-degree reckless injury — last October for allegedly attacking two women on Sept. 29 and Oct. 2. He was also charged with misdemeanor battery.

On Sept. 29, Chung also allegedly attacked a woman from behind and tried to grab her purse at about 1:45 a.m. in the 500 block of North Carroll Street.

Prosecutors say Chung fled when the woman screamed.

In the Oct. 2 incident, Chung allegedly grabbed a UW-Madison student from behind at about 1 a.m. on Observatory Drive, put her in a choke hold and pulled her into a dark, secluded area.

Chung then allegedly showed her a hatchet, taped her hands and mouth, and tried to shove her into the trunk of a car before hitting her two or three times in the head with the hatchet.

After struggling with the woman, Chung pulled out a knife and put it to her throat before telling her to run, police said.

At Wednesday’s hearing, Dane County Assistant District Attorney Gerise Marie Laspisa said prosecutors are considering filing additional charges against Chung but didn’t specify what those could be.

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