reporter:93 degree texas heat. The catt family wasn't headed to a water park, but to a stick up at a small bank in a strip mall. The man with the gun was scott catt and along for his first heist, his... See More
reporter:93 degree texas heat. The catt family wasn't headed to a water park, but to a stick up at a small bank in a strip mall. The man with the gun was scott catt and along for his first heist, his apprentice -- his 20-year-old son, hayden. Their disguises? Painters masks and white overalls. Outside waiting in the getaway car and communicating with the men on walkie- talkie -- 18-year-old daughter, abby. Once we walked into the bank, then it was on. I was running on so much adrenaline and so, so amped, that I wasn't even really feeling anything. Two individuals walked into the bank and -- and they ordered the tellers and everyone into the vault. Reporter: Did they say anything? Put your hands up and get into the vault. He was the muscle with the gun, and I was the money guy. Reporter: Both men are big, over 6'3." Their sheer size and the gun enough to terrify customers. But it's the novice bank robber who's quaking in his boots. I was actually shaking so bad, that the employees grabbed the bag and started throwing money in for me. Reporter: In hayden's hands, more money than he'd ever dreamed of. How much does $50,000 dollars weigh? I'd say about 15 pounds. Reporter: With their garbage bag full of cash, they sprint out of the bank to the getaway car which has been outfitted with stolen plates. The wheelman, a frightened teenager. I was scared. It was just something you just, like, want, want it to be over with. Reporter: And what was it like driving the getaway car? You know, it's hard, because you want to obey traffic laws, but your adrenaline is pumping. It was hard, but I had them in my ear. My dad would yell at me and stuff to not drive fast, so i didn't. Reporter: Despite the heckling from her backseat driver dad, the reluctant 18-year-old gets them to their apartment, a half mile away, undetected. The heist had gone off without a hitch -- just like dad had promised. Was there a "woo-hoo" moment? Not until we got home. Reporter: With their sackful of 50 grand, the spending began. Cars, motorcycles, booze and drugs. Abby's spending -- much more sensible. Reporter: How did you guys celebrate? I didn't. Went off on my own and, and just, got my nails done. Reporter: In fact, the money came so easy and went so fast. Within two months they had burned through all their loot. Time for another bank job. The first community credit union --just a few miles from the scene of their first crime. Before the hit, abby cases the bank. That's her smiling and grabbing brochures from a bank employee. 11 days later, it's the same drill, new disguises. Ditching the painters' overalls for saftey vests to blend in with nearby construction. They walked into the bank, with orange construction vests on. Reporter: Did you carry a gun in there? Uh, no. We, we used a little -- a bb gun. Reporter: But it looked real. Yeah. I remember a few people's faces, still. Reporter: What was their reaction? Um, just, total shock. There's -- Reporter: -- Terror? Yeah, they were scared, terrified. Definitely. You start walkin' into a bank with a weapon and you start pointing that at people and ordering them to, you know, cough up the money, I mean, that -- that -- that can change your life forever. Reporter: Their take after 2 bank robberies -- over $100,000. But the loot isn't exactly divided up evenly according to the kids. What percentage were they willing to give you? 10%. Reporter: Did you feel like 10% was enough? Oh yeah beacause I'd never even had that much money, so -- Reporter: For your whole life. Right. Reporter: 10,000 essentially. It was enough for me. Reporter: Enough to buy a very pical used ford focus and more of those manicures. I guess by now you're aware that in texas, whether you're the driver or the guy holding the gun, holding up a teller -- yep. Reporter: It's the same crime. But you didn't know that then. No, i, I didn't know that then. I know the part that I played was wrong. But it was my family, and that, the loyalty was greater at that point, but her father and brother seemed more loyal to the cold hard cash that was coming in. And to blowing it fast -- shopping, cars, partying. Really nothing to show for it. Reporter: When the comforts of daily life involve jack daniels, a new chevy tahoe, a harley and a swanky houston APARTMENT EVEN 100 Gs CAN Disappear pretty fast. And for the catt family that meant one thing. Time to go back to work. Had you planned another heist before you got busted? Uh, yeah the morning they picked us up, I think we were going to do one or two more. Reporter: That day? Yeah. Reporter: That's right. The catts had gotten cocky --planning a pair of heists the day before their arrest. It got to the point where i thought my father knew what he was doing so well that, there's a risk involved, but the risk was so minimal. Reporter: But that would prove to be wishful thinking because as we all know, where there are robbers, there are also cops. And the cops were already onto them. On the surveillance video from the latest heist, they picked up a detail that would impress even sherlock holmes. The vests looked new. They actually had their creases in them. Reporter: Because they were creased, you figured they were new, and because they were new, they must've been purchased somewhere nearby. We were able to tie those two vests back to a local home depot. And then those vests were purchased with a mastercard debit card, that went back to scott. Reporter: With that mastercard scott catt might as well have left his calling card. And there his kids are using it in home depot to buy the gear they were about to use in a bank heist. It was just the break detectives needed. And the catts were in the bag when scott was arrested -- the -- the detective that actually made contact with him told him, "well, you're under arrest for armed robbery." And -- scott's initial response to that was, "which one?" Reporter: They quickly arrested hayden as well, who was up in the apartment. There they found the kind of evidence gumshoes dream of. In the apartment -- we found some bank straps, and a bank strap is a little paper strap that wraps around -- a certain quantity of money. Usually it's $1,000 denominations, and it identifies whatever bank it is that it comes from. Reporter: And some of those straps were from a bank in an entirely different state! Suddenly they realize catt is no rookie, but a bank bandit with a resume. They now had more than enough evidence to haul both catts in for questioning, and authorities were zeroing in on abby, too. From my interviews with the employees at the comerica bank, we knew that at least scott was carrying a walkie-talkie. Reporter: And that those employees at the comerica bank heard a female voice on that walkie-talkie talking to them. Reporter: Police had a pretty good idea who that voice belonged to, and the getaway girl, abby was arrested that day. Abby called. And she was yelling at me. "I'm in jail and I need $10,000 to get me out of here. Get me out of here right now." And I said, "you have to get that money from your father." She says "he's the reason I'm in jail." We're on twitter throughout the hour we want to know no matter how desperate could you as a parent ask your children what he asked them to do. Tweet me. Just when you thought you saw it all tonight next here the confession tapes, a father, a son, the daughter, three separate interrogation rooms, each with something that would shock even the police.
This transcript has been automatically generated and may not be 100% accurate.