A few police cars converged on Pine Hill Terrace in Stamford Thursday morning, much to the surprise of people living there.

“There was one marked car, two unmarked,” said Brittany Simmons, who added they were still there in the afternoon when she returned home from work.

Their focus was a home at the end of the block and the man who lives there – 73-year-old David Boehm.

Another neighbor, who didn’t want to speak on camera, told News 12 investigators were there for hours, and he saw them walking out of Boehm’s house carrying boxes.

“The trunks of their cars had brown boxes in them,” Simmons added. “I had no idea what was going on.”

The neighborhood would later learn police were raiding Boehm’s home as part of a child pornography investigation. Police told News 12 it all began with a tip about Boehm.

“We teamed up with other agencies regarding this – Homeland Security, which is a typical resource we normally use to do more in-depth stuff when we need other types of resources for investigative reasons,” Capt. Tom Barcello said. “He was on our radar for at least six months now.”

Several months of “tedious” work led to a search warrant. Barcello said the search turned up numerous pieces of evidence, including 15 videos of children engaged in sexual activity. Boehm was charged with first-degree possession of child pornography and given a bond of $750,000.

“Needless to say, we’re very concerned…there's a lot of children on the block,” Simmons said. “We didn't know him. He's very to himself. But very surprised to hear the news.”

Those sentiments were echoed by other neighbors who said they might have interacted with him once or twice in passing.

Boehm was arraigned in Stamford Superior Court Friday where a judge changed his bond to $200,000.

Boehm returned to court Monday, where he posted bond. The judge added several conditions to his release, including GPS monitoring and house arrest except for medical emergencies, legal appointments and religious services. Boehm also had to turn over his passport. He's not allowed to have any unsupervised contact with minors, including digitally, and cannot loiter at any place where minors congregate. The judge also ruled Boehm can't have a smartphone, computer tablet or internet-capable device unless it's approved and monitored by the Office of Adult Probation. 

Police said the investigation into Boehm is ongoing, and there are still 12,000 potential files to review, which means additional charges are possible.