josh mankiewicz: as a military man, john heckel finds solace on old battlefields. military ouman, john finds solace on old battlefields where the past is always present but for john, no peace could be found as long as his wife's killer walked free. >> i would always say, where are we, how close are we to getting him arrested? >> and the police would say? >> the dna won't go forward. >> it's more like, we need more. >> investigators went looking for more, and dug deep looking for kathy. even so, january 28th, 2015, a grand jury indicted lloyd groves for murder, largely on the strength of the same evidence that had been in the files all along. >> it was literally like television. we got there early, 5:00 and sat up. we jumped out and put the handcuffs on him and said, you are under arrest. >> did he say anything? >> he told his son he needed to get a ride to work. it didn't faze him. >> the lloyd is arrested. >> in her thankfulness that we were getting somewhere, we still have a long way to go. >> in many ways, the arrest of lloyd groves was the easy part. legal maneu