robin hoynes' funeral was a big event in this part of town.as well known and so well liked, much of the neighborhood attended, and friends and colleagues, except for one, cheryl, the girl who had switched shifts with robin the night the murderer came to call. >> i had heard that they were really upset with me and that they didn't want me at her funeral, and i didn't go. i mean, i felt really sad that i traded hours with her and, you know, that should have maybe been me, and i just felt very guilty for it. >> a few days after robin's murder, the case seemed to be going sideways. william marshall remained only a person of interest, no new leads had emerged, and that odd clue, the piece of foam, was still just a mystery. then came a break. police got a call from an employee at a kentucky fried chicken 30 miles away from the one where robin was killed. he claimed somebody in army fatigues wearing a cap, gloves and boots had been casing the store after hours. detective lancaster showed the employee pictures of several suspects who might have been p