Before leaving, as he had with Mills and his other victims, the attacker forced Kalmes-Gliege into the bathroom for a long soak to wash away the evidence.
"All I could think about was, 'I can't have someone call my family, my fiancé, my parents, my siblings and tell them that I have been killed six weeks before I get married,'" she said.
He left her alone, shaking in her tub and waiting hours until sunrise to flee.
Although she considered telling no one, she thought, "If I don't tell the police, this person is going to rape yet another person." So she called the cops.
Even through her trauma, Kalmes-Gliege had memorized details of her attacker, from his gait to the haunting eyes behind his mask.
"He had a very distinct way of walking," she said. "Kind of cumbersome. He had very distinct bright blue eyes. I knew I would be able to pick them out as soon as I saw that person."
Mills also remembered his eyes. "When you're staring into those eyes and that's the only thing you can see and the only thing you can focus on, they stick with you."
Detective Wheeler and his partner Matthew Dick realized this was a special kind of rapist; he was a stalker, a man seemingly obsessed with his victims who gathered intimate details about them.
"He's actually engaging in conversation rather than just the quick act of violence," Dick said. The victims described how he would talk almost lovingly to them, as if he was their boyfriend, before getting angry and violent.
And he knew how to cover his tracks. "It was very obvious to us that this was a sophisticated criminal and knew what he was doing," Dick said.
When the police turned to the FBI for help, they were told the rapist might be a seemingly model citizen.
"The one thing they did tell us that I'll never forget is that this would be some guy that everybody works with. They'll say, 'Naw. He couldn't do that. He wouldn't do that,' you know. And it'd be somebody that would be maybe a respected member of the community," Wheeler said.
The police had no prime suspect, until he stalked then 29-year-old Jonelle Galuska. She said she knew she was being watched, so when she was awoken one night by her startled dog, she immediately called the police.
At 1 a.m., Bloomington police officer Dave Zeamer arrived to find a man standing against the house, and in the glare of his flashlight, saw a man turn and walk away.
"I yell, 'Police. Stop, police!'" Zeamer said.
To his shock, he knew the man who turned around. It was one of his own ... fellow Bloomington police officer Jeff Pelo, his former supervisor.
Pelo was a 17-year veteran of the Bloomington police, a former policeman of the year and married father of three.
"You got that relief of, 'Oh, it's Pelo.' But then you are like, 'Wait a minute, it's Pelo. What's he doing out here?'" Zeamer said.
Once a trusted cop, now Pelo was a suspected serial rapist. "As soon as I heard that Jeff Pelo was stopped outside that house, that connection had been drawn in my mind," said Dick.
Mounting evidence revealed how Pelo may have used his police training and access to commit the crimes and cover his tracks.
Detectives found that Pelo's police computer had been used to run license plate searches on three of the victims. Pelo claimed that someone else must have been using his computer terminal.