on the other side, homeowner heidi quezada alone wakes up from the rustling outside. >> i was just petrified. >> reporter: she reaches for her phone, opens up this app and looks at the video from her four surveillance cameras in horror. the burglar just steps away. >> i called 911 and stayed quiet because i thought they could get here and hopefully catch him. >> reporter: while she's on the phone, watch as the burglar gloves up and pops the lock on this sliding door to get inside. >> look at how calmly he walks through. >> reporter: the security alarm sounds off, but the burglar unfazed. look at him walking through her home. >> i can hear him rattling around, and i'm telling 911 he's in the room next to me. >> reporter: what was going through your mind? >> oh, i was just trying not to hyperventilate and i was trying to whisper and trying to tell them, please hurry. >> reporter: he then goes for the master bedroom door. >> i can hear him wiggle the doorknob. he pushes the door hard. >>...