Marc Patrick O'Leary is facing 28 counts in connection to at least two sexual assaults and one attempted sexual assault.
The 32-year-old veteran allegedly stalked a woman in Golden before sexually assaulting her, allegedly tried to sexually assault another woman in Lakewood, and allegedly repeatedly raped a 59-year-old in Westminster according to court testimony. 9NEWS is not disclosing the names of the victims.
Three detectives testified about O'Leary's alleged actions in court Monday during his preliminary hearing.
During the testimony, one of the detectives said O'Leary's DNA has been linked to the cases in Westminster, Golden and Aurora.
At this time, O'Leary has not been charged in Aurora.
According to court testimony, in February, authorities searched O'Leary's home in Lakewood and found cameras as well as photos of his victims in various explicit sexual poses.
Detectives testified a man broke into women's homes in Westminster and Golden took pictures of his sexual acts with his victims. Testimony showed the photos were found in O'Leary's home on memory cards.
The 28 charges against O'Leary include second-degree kidnapping, sexual assault, burglary, stalking, theft and possession of burglary tools.
Of the 28 charges against O'Leary, 10 to 12 of them apply to the Golden incident, eight to 10 apply the Westminster incident and three are directly related to the incident in Lakewood.
O'Leary is being held at the Jefferson County Jail on a cash-only $5 million bond, which is not a common bond amount in cases like these.
The defense asked the judge Monday to lower the bond to $100,000 bond, saying O'Leary has family in the area, and can stay with and be monitored by them. The defense also said O'Leary has served his country and doesn't have a criminal history.
Judge KJ Moore said O'Leary was a "tremendous danger to the community" and denied the defense's request.
The defense said it expects an eight to nine month trial.
A Jefferson County prosecutor called O'Leary a "prolific sex offender that is an extreme, extreme danger to society."
Moore said O'Leary could receive a life sentence if convicted.
Attacks on assaulted women similar
The three detectives that spoke during the preliminary hearing Monday described three separate attacks, all of which had some possible similarities.
Lakewood Police Det. Aaron Hassell testified the attempted sex assault in his jurisdiction took place in July of 2010.
Hassell says the woman found a man in her bedroom at 2:15 a.m. He tied the victim and threatened her with a knife. He left after she kept screaming.
Lakewood Police believe he may have gotten in through the garage, which was left open for the victim's pet.
The alleged assault in Westminster took place in August 2010.
Det. Edna Hendershot testified that a woman said she was in bed at midnight and woke up at 2 or 3 a.m. to find a man in her bedroom.
According to court testimony, the intruder told the 59-year-old victim he had a gun and he would use it if she didn't cooperate. The attacker told the woman she had left a window open.
Hendershot said the victim cooperated, and her hands were tied behind her back. The intruder then took pictures of her in various poses and repeatedly sexually assaulted her.
The victim also told police the intruder took pictures of her after he dressed her up in stockings and put shoes on her.
Hendershot said the assault lasted two and half to three hours. The victim told police the attacker took $250 to $400 from her safe and took her camera, a pink Sony.
The victim also told investigators the attacker asked her to shower for 20 minutes. They timed the shower on a kitchen timer that investigators say had DNA on it. The court testimony showed that DNA was O'Leary's.
The same DNA was found in the Golden and Aurora cases.
Hendershot testified over 100 photos of the Westminster victim were found on memory cards in the defendant's home.
Stacy Galbraith with Golden Police also took the stand. She said she interviewed the victim in the alleged Golden sex assault.
The female victim told her she went to bed about 7 a.m. and woke up to an armed man in her bedroom at 7:50 a.m. on Jan. 7.
She told police he threatened her, bound her arms and repeatedly sexually assaulted her over three to four hours.
Galbraith testified the attacker wore a mask and had an egg-shaped mark on his right calf. Galbraith says she saw a similar birthmark on O'Leary's leg.
The victim told police the man dressed her up and white stockings and put some high heels on her that he took from a backpack he brought with him.
The Golden victim also told police she talked to her attacker, who told her about his military past, living overseas and speaking a number of foreign languages.
The court testimony revealed the attacker also told the 26-year-old victims he had been to her apartment before. He told her information from her passport and knew she had a roommate.
Even though it is not clear how the attacker entered the victim's home, he instructed the victim on how to secure her sliding glass door.
Galbraith said the attacker took pictures of the victim on a pink Sony camera.
Investigators later found the camera in O'Leary's home. Investigators were able to retrieve 400 pictures of the Golden victim from the memory card.
Testimony showed the attacker wore a ski mask, used gloves with a specific pattern in a couple of assaults.
He made women in the Westminster, Golden and Aurora shower after the assault, specifically instructing them what to do. He also made the women in Westminster and Golden brush their teeth.
Investigators testified an attack in Aurora had similarities to the ones in Westminster and Golden.
It was a surprise attack, and the victim was straddled and photographed.
As in Westminster and Golden, the bedding was taken and underwear removed.
Investigators testified at least 10 pairs of panties were found in O'Leary's Lakewood home.
Detectives told the court O'Leary served in the military until 2009 and was in reserves in Seattle from 2006 until 2009. In Lakewood, he did web design. He also attended Red Rocks Community College.
At his home, investigators recovered a small hand gun he recently purchased.
Testimony revealed police in the Seattle area are investigating a similar assault.
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