theory that this was a botched burglary. by the level of violence that occurred in the residents, the theory was that it was a man or to men that had entered the residence to do a burglary and a or a home invasion that went wrong, and murdered the victim to cover up the crime and fled. >> reporter: gone wrong, because sherry somehow surprised them. they panicked, shot her and then fled. the theory seemed to make sense, especially sherry had no apparent enemies, no one who would want to kill her, or so they thought. >> coming up -- >> we wasn't to sherry's office and said that, if she could not have john, nobody could. >> when "dateline "continues. so, let's make this the summer of loving your gut. activia. love for your gut.