This doorbell camera video shows what Bair, Texas police say are skilled thieves approaching a suburban home. But look what happens as they get closer. The camera starts to glitch and the picture warps.All because police say the thieves are using a jammer, a small device that disables a home's Wi-Fi. It's something security systems rely on. Police say the use of Wi-Fi jammers is growing, ramping up just as the holiday season peaks with criminals targeting packages left on the doorstep.Security experts say t ...

This doorbell camera video shows what Bair, Texas police say are skilled thieves approaching a suburban home. But look what happens as they get closer. The camera starts to glitch and the picture warps.All because police say the thieves are using a jammer, a small device that disables a home's Wi-Fi. It's something security systems rely on. >> They're not hard to get.I think they cost about $60 or $70. These jammers usually work for a very short range, 10 to 20 feet. Police say the use of Wi-Fi jammers is g ...