Snake, slithers, strikes. I wonder how long the writer had to think to come up with that headline.
How does he slither in without opening a door or window? Does he come up through the sewer and out the toilet?
https://www.youtube.com/watch?v=1Kgr_IW1eGI
Most motion detectors, even newer ones, use infrared to detect significant changes in the surrounding room’s temperature. Normally, walking around in a room would set off these sensors, but using something as simple as a piece of styrofoam to shield your body can trick them.
My focus would be on current and former ADT employees, as they would be the mostly to know of a flaw within their security system.
Sounds like a burglar alarm installer gone bad.
Why bother being sneaky. In California you can just walk into a business and take what you want daring the owner to stop you.