It seems like Jennifer would have had to have been wrapped in something (plastic tablecloth, tarp, shower curtain) to be transported to Center Road -- so whatever was used would have had to be discarded.
Unless she was clothed when taken there (unlikely, I think)...but those clothes would have had to be discarded as well, if that was the case. Or even if that weren't the case, if the black jacket and blue/purple top were found hanging in her closet, that might be problematic for someone...
Anything used to restrain her -- duct tape, handcuffs...
Her purse...