Transcript for NFL player credits car cam app with catching alleged thief 'red-handed'
Reporter: You're watching what police say is a burglary in progress. The target? A souped-up dodge charger. But what this alleged burglar doesn't know is that this car is owned by this guy. And he is in! Reporter: Alex ar Maud junior, a rising star for the Carolina panthers. How big are you? 6'2", 250. Reporter: That's a lot of football player. It helps on the field. Reporter: You are trained to have a target. This video shown for the first time shows Alex capturing a man police say had broken into his Stop ! Reporter: Exchanging a few choice words and holding him until police arrive. I can't relax like this, I can't either, you just tried to break into my Reporter: Thanks to this, a security camera installed in his car. What he did next should not be tried at home. Devices like owl are part of the multi-billion dollar consumer surveillance market, protecting our cars and our homes with smart devices like ring and Google nest. Making it easier to catch thieves in the act. Our homes, our cars, obviously, they're some of our biggest investments. And they also, we're personally attached to them. Cars, et cetera, mean something to us beyond the dollar value. Reporter: Which means something to Alex, the son of a tax accountant, a hard-working immigrant from Ghana. When you got that first check how did you spend it? My first purchase was a car. Reporter: What did you buy? Charger. Reporter: So this was your first car. This was my first legit car. Reporter: It wasn't just your first car, your first love. Yeah. Reporter: But just months after driving that first love off the lot. December 15th, my car was broken into. Windows shattered. Glass hangin' out on my paint, scraped up on the side of my car. Reporter: When you saw it, what was your reaction? You just feel very violated. And I feel like it's disgusting to see your own property like that, something you worked hard to get. Reporter: So Alex desided to invest in security. Choosing that owl, linked to his cell phone with real-time video if there's been a crash or break in. What was happening the night it happened? I was doing a late-night ab routine. Reporter: Like we all do. And I got this instant notification on my phone. I check, see someone in my car and that's when the adrenaline starts moving. Reporter: Then you go out. I go into kick-ass mode. Reporter: And an ah-oh moment for the alleged burglar. I see this guy finishing, closing my door and he sees me walking toward him in an aggressive man ir. . Reporter: And what did you do? He tries to run. I grabbed him and threw him out here. He comes this way. In between these two cars. Reporter: And he's making a run for it. He's making a run for it. I will break your . Reporter: Restraining him with a grappling move called an arm bar made famous by fighters in the ufc. Reporter: Where did you pick this up? I don't know. Reporter: Watching a lot of I was just like I'm going to arm bar this fool. Reporter: All captured on Alex's cell phone video by his apartment concierge, earning armoire a new nickname. Arm bar. He was like man, not again, this happened again? I was like yeah, this time I caught the guy. And they were really impressed. They were like, you did a good job, you did what you had to do. Reporter: The alleged burglar, a 32-year-old from Charlotte, arrested and charged with entering a motor vehicle. He's scheduled to appear in court later this month. Were you ever afraid for your safety? No. Reporter: How come? I was just prepared for anything. And whatever was going to happen was going to happen. Reporter: According to the there were more than 7.5 million cases of property crime in 2017, costing victims an estimated $15 billion. You can see a lot from here. We can. There's about a thousand cameras right now. Reporter: Here at the Charlotte police department's real time police center, public and private surveillance cameras monitor potential crimes around the clock. How much of a game changer is this broadly-speaking surveillance cameras? Pictures speak a thousand words. It's one thing to have an officer sit up on the stand and describe it. It's completely different when they can look at it. Reporter: But police warn no one should be taking the law into their own hands. What about people getting hotheaded? You don't want to take a property crime and turn it into a violent crime. You don't want to go from a victim to a suspect. Reporter: If you're able to break up a couple of these high-volume car thieves you may be breaking up a whole criminal If they're stealing a car on Friday, they may be selling drugs on Saturday and doing something else on Sunday. It could translate into house breakings, shootings, all kinds of things. Reporter: And companies like owl are hoping to disrupt the bad guys by arming consumers with high-def evidence. We hear the story where someone calls up the police, hey, my car got vehicle got broken into, I have video. Well, videos aren't that good. And then they send an owl camera video. And they have this Duh look. Reporter: Owl in the headlights. Owl in the headlights. Reporter: There is the inevitable question of trading privacy for security. Should people have privacy concerns. This is for you. Reporter: It's not all about break-ins and fender benders. There was a woman name the Jennifer. Two guys came up to her. Said they had a gun. She thought to kind of walk in front of the car, pulled the two of them into range of the she points at it and says do you really want to do this? And they back off. And in less than an hour, those two were both arrested. Reporter: Four Alex, crime fighting is not replacing his day job anytime soon. I know what your mom said. What did she say? Go ahead. Reporter: Don't ever do that again. She's happy I got it taken care of. But she's like, you don't have to do that. Reporter: I'm juju Chang in Charlotte, North Carolina.
This transcript has been automatically generated and may not be 100% accurate.