FBI slayings show risk surveillance cameras pose to police

FORT LAUDERDALE, Fla. (AP) — The child pornography suspect who gunned down two South Florida FBI agents this week somehow knew exactly when they were approaching his apartment.

Authorities are investigating whether he may have used his doorbell’s security camera to time his ambush, firing a high-powered rifle through the door as their team neared to search his home and computer.

That's a danger police nationwide are facing: As outdoor surveillance cameras now protect about half of U.S. homes from criminals, the criminals are using them to get a jump on officers about to raid theirs. Some doorbell cameras even have motion sensors that alert owners when anyone comes within 100 feet (30 meters).

The cameras, combined with the military-style weaponry many criminals possess, leave law enforcement offers particularly vulnerable. In such situations, the house's doors and walls offer no protection, noted Ed Davis, Boston’s police commissioner from 2006 to 2013.

“You take a military assault rifle and you add to that a surveillance system that allows (the suspect) to identify where officers are as they approach the house — you are a sitting duck,” Davis said.

The FBI says David Huber, a 55-year-old computer technician with no criminal record, gunned down agents Laura Schwartzenberger and Daniel Alfin and wounded three others. He then killed himself. The agency hasn't said whether Huber's camera had a motion detector, but that could explain why he was awaiting the agents Tuesday before dawn — an hour officers often pick for raids because the suspect is likely asleep.

“A child exploitation suspect, he is going to be on his toes all day long — he doesn't want to get caught because he is going away for a long time,” said New York City Detective Robert Garland.

In the 1980s and '90s, a home with outdoor...