American Ripper

I watched this gripping story and am still disappointed that any results of dredging the river near a factory Holmes owned was not revealed. Amarylis and Jeff visit this spot towards the end of the presentation and agree that it would have been easy and indeed probable that incriminating evidence may have been discarded underwater. They agree it should be dredged and checked but the show just ends there. I am to this day wondering if anything like that was done! Quite frustrating reallly, and not logical that it wouldn't have been followed up on given their 'thorough' investigation'. Hopefully someone will reveal this to those of the watchers who may be also wondering.