I haven't read anything about her dress, but there is something that looks like it could be the dress at the bottom of that hamper ( same color) . Ive read others say that also. I can get a pic but there are 800+ it might take a minute
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ok I found a still from Grizly true crime, there are others but this is the best close up. you can see what looks like it could be the squares on her dress. Not sure why those boxers are there either? why in her laundry? and theyre the same kind he was arrested in 3 days later so we know they are his.