SCOTTSDALE, AZ (3TV/CBS5) -- A 57-year-old Scottsdale man is accused of having sexual contact with a 3-year-old girl.
On June 6, Scottsdale police detectives received a tip from the National Center for Missing and Exploited Children that hundreds of images and videos were uploaded of 57-year-old Mitchell Mielke sexually exploiting children.
Mielke had been an irrigation technician for almost 20 years with the City of Scottsdale.
"For the police department, this is one of the most vile and disgusting cases that we ever see," said Scottsdale Police Sgt. Ben Hoster.
Detectives reviewed the files uploaded by Mielke which contained child pornography. Many of the files showed Mielke sexually exploiting and having sexual contact with a 3-year-old girl.
The family of the victim was contacted. Detectives learned that Mielke was watching the victim once a week for more than a year.
Mielke was arrested outside his Scottsdale home on Thursday night without incident. He is facing numerous counts of sexual contact with a minor and sexual exploitation of a minor.
Arizona's Family went to his listed address, and a woman identifying herself as his roommate started talking through the door.
"Were you here yesterday when he was arrested?" asked reporter Briana Whitney.
"Yes," she said.
Then she opened the door and politely answered more questions face to face.
"I'm devastated and I've been evicted, so if you could leave me alone," she said.
"Have you gotten to talk to him since he was arrested?" asked Whitney.
"No," she said.
"Are the girls that were named OK?" asked Whitney.
"I'm assuming so. I don't know," the roommate said.
"I'm just wondering if the charges were a surprise?" asked Whitney.
"Oh yeah," she said. "I had no clue."
Scottsdale police said there are more pictures and videos they're going through, and believe there may be more victims.
On Friday evening, the City of Scottsdale released the following statement, stating that city officials were "shocked" about Mielke's arrest:
“Upon learning about the charges filed against Mitchell Mielke, the city immediately placed this employee on unpaid suspension pending termination proceedings. He had been a city irrigation technician for 19 years. The city is shocked over the nature of these allegations, and deeply sympathetic to the victims and their families.”