Neighbors knew the white, one-story house at 56 Swifts Beach Road as the one with an assortment of used children’s bikes for sale on the lawn, repaired by an older man who lived there with his adult son, Brandon Dalomba.

On June 23, residents saw an assortment of unmarked police cars descend on the property, parked haphazardly “like in a movie” said a neighbor. After a months-long investigation, Dalomba had been arrested on child pornography charges.

Later that day, Dalomba, 35, was arraigned in Wareham District Court on four counts of possession of child pornography.

One neighbor, Maria Dunn, who lives a 30-second walk from the house, said neighbors were worried when Dalomba moved in a few years ago, aware of his past arrests.

Listed as a Level 3 Sex Offender, meaning the individual is “at a high risk to reoffend,” Dalomba was convicted of three charges of indecent assault and battery on a child under 14 years of age in 2000. In 2008, he was found guilty of one count of indecent assault and battery on a person aged 14 or older.

Since moving in, however, Dunn said Dalomba was never a cause for a concern, usually working on an old car parked in front or helping his father repair bikes.

“He was quiet,” said Dunn, who has a young grandchild often visit her at home. “We never saw him staring at kids. He never caused anyone trouble. They were very quiet people. We didn’t even see him that much.”

According to police, Dalomba’s charges stemmed from messages he allegedly sent on ChatStep.com. The website bills itself as offering a “secure, private and web based disposable chat room.”

Police said ChatStep submitted two cyber tips to the National Center for Missing and Exploited Children that photos, which allegedly contained child pornography, had been uploaded and posted during a chat and the person uploading the images lived in Plymouth County.

The State Police task force reported that it located a computer that was sharing files containing child pornography. The computer’s location was traced to a home in Wareham and, on June 16, State Police obtained a search warrant for that address. Police seized four desktop hard drives, one laptop, desktop hard drives, a ZTE 981 cellphone and other additional storage media equipment and devices.

Forensic examiners determined that there were numerous digital files depicting child pornography that had been downloaded from a computer connected to Dalomba’s cellphone.

Dalomba pleaded not guilty on June 23 and was held on $40,000 cash bail, with the conditions that if he makes bail, he will be placed on a GPS monitoring bracelet and ordered to have no contact with children under the age of 18 or electronics.