dr. 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 handed me this thing, this arrest warrant. >>> coming up, the case heads into court with a surprise from the stand. >> hear from my mother. >> stephen and jody scharf's only son has dark secrets to share. >> did you see that abuse? >> i did. >> when "over the edge" continues. ♪ for all the noses that stuff up around daisies. for all the eyes that get itchy and watery near pugs. for all the pe

dr. michael baden, a world renowned forensic pa pathologist who investigated the deaths of john f. kennedy and john belushi and testified at the trial of o.j. simpson. he was about to turn 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. >> reporter: in december of 2008, detectives paid one more visit to steven 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. >> reporter: 16 years after that fatal night on the cliff, police were back. and steven scharf was in for a shock. after all these years you thought it was done. >> not until they reached behind and handed me this thing, this arrest warrant. >> coming up, the case heads into court with a surprise from the stand. >> hear from my mother. >> steven and jody scharf's only son has dark secrets to share. >> did you see that abuse? >> i did. >> when "over the edge" continues. in an unreasonably narrow fast food drive thru lane. but what a powerful life lesson. and don't worr