reporter: police even looked into susanne s shopping habits and found something that intrigued them. susanne bought her groceries at a nearby shoprite, a big supermarket chain. in fact, she was a creature of habit, visiting there 22 times in the month prior to peggy s murder. but on the 23rd time, the night before peggy s murder, susanne shopped at a different store, the one near her mother s house. what did she buy? she bought cleaning supplies, rubber gloves and some other items like that. reporter: had the crime scene been cleaned up? detectives didn t think so. but still found it suspicious. just before your mother was murdered, you go to the shoprite. not the one near your house. the one near your mother s house. mm-hmm. reporter: and you buy rubber gloves and cleaning supplies. i did. i mean, i buy cleaning supplies all the time. i have a cleaning girl. she probably needed rubber gloves. she probably needed floor cleaner. that s interesting.