narrator: since detective ken mifflin assumed he was dealing with an arson fire, he asked scott purkbvious question -- "was there anyone who would want to harm him or his family?" and scott immediately volunteered a possibility. scott and his wife had an open relationship. they were swingers, and they had an interesting lifestyle, to say the least. mifflin: they openly date, even long-term-dating the same people within the marriage, and they're both comfortable with that. they both have their own girlfriends and boyfriends and so forth. narrator: was it possible a boyfriend or a girlfriend from outside the marriage had attacked the family? that does open a door to the possibilities that there were other people that could be involved with this situation. narrator: as police explored this possibility, they also did a standard background check on scott purk, and that turned up more than a few surprises. scott was an ex-convict with an infamous reputation. he was known by local media as "the ninja burglar." he was arrested for committing at least 10 different burglaries or breaking into