we call into question whether or not this was a crime of some outsider coming in and trying to rob mr. rogers, or was it someone who had access to his house, access to mr. rogers? >> investigators asked the victim's estranged son, donald, where he was at the time of his father's murder. he said he had an alibi and offered to take a polygraph test. >> the guy who gives it to me, he says, well, you passed the polygraph test. i says, passed it? he says, yeah. he says, you're a lousy liar, which, that's cool, you know? >> so, investigators turned their attention to sharon zachary, who not only lived next door to rogers but worked as his caretaker. sharon said she was with a friend shopping all day across town, but investigators discovered something suspicious. she made several large expenditures in the months leading up to rogers' murder. >> she started spending money. from about january to around april, it's estimated about $65,000 was spent on her own personal items. >> she bought a new car, a boat, and took her family on a caribbean vacation. the expenses exceeded her family's discretionary in