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Coleman Chung, accused of attacking two women last fall in separate UW campus-area incidents, including one in which a woman was struck with an ax and ordered into the trunk of a car, was charged Tuesday with sexually assaulting a third woman after she passed out at a campus dining hall, and recording the assault on video.

Chung, 30, of Monona, was charged with four counts of second-degree sexual assault of the 17-year-old UW-Madison student, which happened early the morning of Sept. 29 at Gordon Commons on the UW-Madison campus, according to a criminal complaint filed Tuesday.

Chung is scheduled to appear in court on the new charges on Thursday. He has been in custody since his arrest on Oct. 10.

According to the complaint, police became aware of the assault after finding deleted videos and photos on an iPod Touch seized from Chung as part of their investigation into the Sept. 30 and Oct. 2 campus-area attacks on two women. The complaint states that the videos and photos were deleted from the iPod after the Oct. 2 attack but the files were later recovered by police.

Chung is also on probation for a 2015 federal child pornography possession conviction.

The videos and photos don’t show Chung’s face, the complaint states, but show the woman being touched and groped by a hand as she lay passed out on a bench. Using time stamps on the videos and correlating them with video surveillance on campus, UW-Madison police in December were able to figure out where the assault took place and found surveillance video of a woman whose clothing and appearance matched that of the woman depicted in the images recovered from Chung’s iPod.

That woman then identified herself from the recovered images and from campus surveillance video.

Chung was charged in October with attempted kidnapping, armed robbery and first-degree reckless injury for an Oct. 2 attack on a woman who told police that she was grabbed and choked by a man as she walked on Observatory Drive. The woman was struck with a small hatchet and was ordered to get into the trunk of a car, but fought back, a criminal complaint states.

Chung’s federal probation officer later identified Chung as the attacker from UW-Madison surveillance video.

The day after the Gordon Commons sexual assault, but two days before the Observatory Drive attack, a man later identified as Chung grabbed another woman from behind in the 500 block of North Carroll Street and tried to grab her purse. He fled when she screamed.

Chung is charged with attempted robbery and misdemeanor battery for that incident.

According to the sexual assault complaint filed Tuesday:

The sexual assault victim, once UW-Madison police identified her in December, said that she had been out drinking with friends the night of Sept. 28 and 29, including at a bar on State Street. She said she doesn’t remember leaving the bar, only waking up in her bed the next morning.

A friend told her that she had been found outside Gordon Commons the morning of Sept. 29, but the woman said she has no memory of being there.

The surveillance footage taken by cameras outside Gordon Commons shows Chung appear. The woman then appears and enters Gordon Commons, and is followed inside by Chung less than a minute later. There are no security camera views of the assault itself.

Chung later leaves Gordon Commons and then goes back inside, the video shows, then is seen helping the woman walk out of the building. He walks her to a patio area, where they go off camera. A few minutes later, another woman is seen on the video walking with the woman toward Sellery Hall.

Ed Treleven is the courts reporter for the Wisconsin State Journal.