"It's difficult for me to talk about," said Dave, a father who does not want his full name released in order to protect the identities of his girls.
Peoria police said three of Dave's daughters were sexually abused by their mother's boyfriend, 44-year-old Dennis Tourville.
"Devastating. It was very, very emotional," said Dave.
Tourville was arrested Oct. 31 on 20 felony charges including sexual abuse, molestation and rape of the sisters dating back to 2006, when he started dating their mother.
At the time, the girls were 16, 14 and 10.
Court paperwork says the abuse happened at Tourville's Peoria home and at Mad Hatter Mufflers and Brakes where he worked.
Police said he threatened the girls if they told anyone.
"Probably the worst thing I've ever heard as a parent. Nothing worse than that," said Dave.
Peoria police said the investigation has been under way for two years.
They said Tourville harassed the eldest daughter and put naked photos of her on Facebook. He tried to make it look like she was crazy, getting her institutionalized when she attempted to get away from him.
"We believe that he got a cell phone, registered it as the victim and were making calls and text messages to himself. Then was able to turn that information around and get her involuntarily committed," said Amanda Jacinto, the spokesperson for the Peoria Police Department.
Doctors at Recovery Innovations of Arizona let her go almost immediately.
Investigators also found that starting in 1988, multiple reports of rape against Tourville were filed in other states.
His alleged victims included a former spouse and several teenage family members.
There wasn't enough evidence to prosecute, but Peoria detectives recently located the victims.
Tourville is a convicted felon and was not allowed to possess guns. Peoria police said they found several weapons along with ammunition inside his home.
"He's a monster that's been walking in the shadows for years and nobody's known. He's gotten away with it for all these years," said Dave.
The girls' mother has not had contact with her daughters for two years.
"I think she knows a lot more than people believe," said Dave.
Police said the girls' mother refuses to cooperate, and has since married the man who stands accused of sexually abusing all of her daughters.
"I'd like to see him do prison time for the rest of his life, and not see the light of day," said Dave.
In a late statement from the eldest daughter to CBS 5 news, the victim states:
"Although I am relieved that Dennis has been arrested, I am also aware that we are far from being done with this whole ordeal. The past few years have been the most difficult time of my life. It was a nightmare I never thought I would escape. But then I realized how fortunate I am, because I fought back and won. This victory is not just for me, but for my family, and for the many other victims who suffered like I did. I am proud to finally be able to confidently say that Dennis Tourville is no longer a threat. The Peoria Police Department worked extremely hard to make this become my new reality."
Copyright 2012 CBS 5 (Meredith Corporation). All rights reserved.
Sunday, May 19 2013 11:18 PM EDT2013-05-20 03:18:15 GMT
Relatives and dozens of Beech Island community members gathered today in front of Island Cuts Barbershop to remember Zann Worrell. "I was totally surprised and very happy that everybody came out becauseMore >>
Dozens of Beech Island residents gathered tonight to remember Zann Worrell, who was fatally shot in his barbershop on Saturday afternoon.More >>
Sunday, May 19 2013 6:18 PM EDT2013-05-19 22:18:38 GMT
Aiken County deputies say they searched with New Ellenton police officers for two armed men who shot dogs on Sizemore Avenue on Saturday night. Aiken County deputies say they started searching for the suspectsMore >>
UPDATE: Neighbors are shocked after two suspects shot three dogs in a New Ellenton neighborhood Saturday night. More >>
Sunday, May 19 2013 4:20 PM EDT2013-05-19 20:20:12 GMT
One person has been transported to the hospital after being shot at Axis Barbershop in Beech Island. Aiken County dispatch said it happened around 2:30 p.m. Saturday. There are at least two suspects,More >>
Aiken County Coroner's office has confirmed that 32 year old Zann Worrell Jr. of North Augusta died at GRU Medical Center on May 18, 2013 at 3:37 p.mMore >>
Sunday, May 19 2013 3:11 PM EDT2013-05-19 19:11:10 GMT
Richmond County Dispatch confirms there has been a stabbing at a Family Dollar. Deputies say it happened on the 2900 block of Dean's Bridge Road around 7:18 tonight. Information is limited at this tiMore >>
UPDATE: Richmond County investigators said Tonya S. Terry was stabbed several times in the chest area inside the Family Dollar on Dean's Bridge Road Saturday evening.More >>
Sunday, May 19 2013 10:04 AM EDT2013-05-19 14:04:50 GMT
Richmond County dispatch received a call around 7:20 a.m. that the Millbrook Apartment building was on fire located off of Skinner Mill Road. Firefighters were on the scene until around 8:30 a.m. No injuriesMore >>
Richmond County dispatch received a call around 7:20 a.m. that the Millbrook Apartment building was on fire located off of Skinner Mill Road.
Saturday, May 18 2013 7:23 PM EDT2013-05-18 23:23:19 GMT
A fundraiser was held Saturday in honor of Wesley Spires. Local firefighters held a boot drive to honor their fellow volunteer firefighter who remains in critical condition after he was beaten by whatMore >>
A fundraiser was held Saturday in honor of Wesley Spires. Local firefighters held a boot drive to honor their fellow volunteer firefighter who remains in critical condition after he was beaten by what investigators said was a bat along the Augusta Riverwalk on May 3rd.More >>
Saturday, May 18 2013 7:05 PM EDT2013-05-18 23:05:19 GMT
Instead of spending the day at the computer, some Augustans spent their day learning about it. People gathered at the Imperial Theater for Web Afternoon. Mayor Deke Copenhaver gave remarks about Augusta'sMore >>
People gathered at the Imperial Theater for Web Afternoon. Mayor Deke Copenhaver gave remarks about Augusta's growth in the technology sector.More >>
Saturday, May 18 2013 5:55 PM EDT2013-05-18 21:55:44 GMT
Michael Robert Bradford, an employee of DynCorp International, has been killed in Afghanistan.Bradford was a Grovetown resident, according to information from a DynCorp spokesperson.The spokesperson toldMore >>
Michael Robert Bradford, an employee of DynCorp International, has been killed in Afghanistan.More >>
Saturday, May 18 2013 2:47 PM EDT2013-05-18 18:47:31 GMT
Georgia Power crews are working to fix power lines at William Few Parkway and Knob Hill that were struck from a car crash around 9 a.m. Saturday. Columbia County dispatch said two cars were involved withMore >>
Georgia Power crews are working to fix power lines at William Few Parkway and Knob Hill that were struck from a car crash around 9 a.m. Saturday.More >>
Saturday, May 18 2013 2:40 PM EDT2013-05-18 18:40:22 GMT
Richmond County Sheriff's Office released the following information in regards to Deputy Creech: Sheriff Roundtree and the family of Deputy Alton Daniel Creech would like to thank everyone within our community forMore >>
Funeral services will be held at First Baptist Church of Augusta, 3500 Walton Way Extension, Augusta, Georgia on Tuesday morning, May 21, 2013 at 11am. Deputy Creech will lie in state for one hour prior to the service.More >>