dead end? here again is keith morrison. >> after two years of relentless police work, tom dove's investigation of the murder of jack jessee had generated enough evidence to fill this mail cart. all apparently for naught. the suspect and his key to cracking the case had skipped the state and detective dove's jurisdiction. >> we were so close. >> the jessee family sensed dove had been beaten and sandra jessee had won, had gotten away with murder. >> i put his pictures away. it was tough because he was so -- he was so fantastic. >> put his pictures away? >> i had to. it was just too much. >> couldn't look at them? >> i couldn't look at him. >> at the dove home, tom's wife patty began to worry about her husband's health. >> he tends to hold things in. and you can't hold in that kind of frustration and emotion without it starting to affect you. with that kind of stress, it takes a toll on him physically and mentally. >> that's what you worry about?