>> chief perry was struggling to tell us that he did know what it was like to lose a child. it came out of retirement and took the job as head of the kauai police department after the sudden death of his 26-year-old son, erickson. >> i feel, and away, that i am working through him. that he motivates me. i believe that. things happen for a reason. in fact, i told larry this. i told him, there's a reason why we met. i don't know what the reasons are, but i am here for you. >> so, after meeting with larry, chief perry sent sandra's file to a couple of friends in honolulu, investigators with the state attorney general's gold case unit. >> i asked if they could find anything else that we may have missed. >> and they did indeed find something. using what was breakthrough science for that time, early 2009. gold case investigators extracted touch dna from sandra's shirt and brawl. chief perry called larry with