so it s, obviously, a battle. reporter: uphill battle does not begin to describe it. the cold case the detective opened on that bleary-eyed monday morning would lead him on a w chase of a lifetime and sha the foundations of the lapd. dates back to 1986 and a battle for the truth by the parents of ah young bride. we miss her every day. reporter: those parents are nells and loretta rasmussen. doesn t make any difference what day it is. it s pain that is always there. there s no cure for. reporter: who. would want to kill sherri rasmussen? she was hard working, caring, and popular with her coworkers, trained as a nurse, sherri was director of critical care at a large local hospital. we are implementing the people difference program. it was a devastating day. she was 29 years old and just in