>> that homeowner joseph mueller and the vet bret mccann join us now. o calling police. joseph, you had an alert on your phone, and you found out that your home was being invaded somehow. what did you do? take me through what happened next. >> when i saw the gentleman in my house, it was pretty surreal. so i immediately called bret, and told him i'm getting robbed. and i'm not sure what i need you to do, bret, but see what you can do, man. >> and bret, he took action. you're like i got to figure this out on my own. air force veteran, i'm going to happen to it. what did you do and what did they say? we heard some of it when you show up and say, that's not your house. >> well, as soon as joe called me, i jumped up, i was having my cup of coffee, watching the news, and when he called, i grabbed my gun, went outside, tried to assess the situation, and hopefully i was trying to wait for the police to show up. but, they didn't show up until after the robbers left. >> so what happened to his keys? did you snag his keys out of the car? he just couldn't find them