michael baden, a world renowned forensic pathologist who investigated the deaths of john f.dy and john belushi and testified at the trial of o.j. simpson. he was about to turn up the heat on a very cold case. >> dr. michael baden has reviewed the evidence and has determined that this could not have been an accidental fall. >> in december of 2008 detectives paid one more visit to stephen scharf. >> they wouldn't tell me what it was for. i had no idea what this was about. i mean, it didn't make sense. >> 16 years after that fatal night on the cliff police were back and stephen scharf was in for a shock. >> after all these years you thought it was done. >> not until they reached behind and hand me this thing, this arrest warrant. >> coming up -- the case heads into court with a surprise from the stand. >> i'm here for my mother. >> stephen and jody scharf's only son has some dark secrets to share. >> did you see that abuse? >> i did. >> when "over the edge" continues. dear freshpet, rudy got older and suddenly stopped eating... then we found freshpet. now rudy's 13, and going o