shea might have missed. they have the help of an eagle eye detective. known the the evidence whisperer. prosecutor matt murphy thought daron wyatt's investigation of cathy torrez's murder was compelling. but he knew that making the case against sam lopez wouldn't be easy. the d.a.'s office had declined to try it twice before. so murphy called for help from a detective whose legendary skill with cold cases has earned him a reverential nickname. >> larry montgomery is the real deal. i mean, the guy is -- the evidence whisperer. another nickname for him is st. larry. >> reporter: larry sees things other people don't see? >> larry sees things that many people don't see, yeah. and he looks at it from a different perspective. >> reporter: they both felt the key to the case lay in sam lopez's own words, his taped interviews with the original detectives. and they thought the perfect man to listen to those interviews was the evidence whisperer.