randy tundidor jr. arrant for violating his probation and a burglary wrap. did you go talk? >> we couldn't find him. >> but detectives could find his father, randy sr. at the town house. randy sr. said he hadn't talked to his son in a while. and when police went looking for randy jr. at the family window tinting business called gator tint, an alert officer noticed something suspicious. >> a canine sergeant sees stuck between the lid of the dumpster and the dumpster itself, a zip tie. i drive down there. i immediately identify it as the same make, size, of the ones used in the murder. that's a solid piece of evidence. >> that's your first break? >> yeah. >> randy sr. allowed police to search the business without a warrant. >> immediately we see there's a bag of the same type of wire tires that were used to tie up joseph morrissey. they also sell knives at the business. there's an empty box that holds a 15 inch bowie knife. when he's asked, where's the knife that belongs to this box, he tells us it should

. >> there was randolph murdaugh sr., then randolph buster murdaugh jr., and then randolph "randy" murdaughii. >> they were the big fish in the small pond. >> you're the person that the community looks to to keep you safe, to prosecute the people who do wrong. and so it is a powerful position. >> not only did they have this built-in system of power, by nature, a prosecutor and a law enforcement officer -- whether it be a sheriff or a police chief -- have to work together. but the murdaughs took it further, and it was a social thing. they might go hunting or fishing with the jasper county sheriff. they might drink whiskey with the beaufort county sheriff. they might invite the hampton county sheriff over to the house for barbecue. >> in addition to the murdaughs' history in the solicitor's office, the they also founded a prestigious civil firm more than 100 years ago. >> so, no matter what you were doing in the legal field, whether it was criminal or civil, chances are you're going to bump up against a murdaugh. >> so, it's into this family of power and privilege that paul murdaugh is born.