kenlein remained a solid suspect for the same reason tom walker did.s still weren't sure exactly when chanin was killed, so they couldn't alibi any of their suspects. bryant: chanin was seen when she dropped the kids off, and then her body not found for almost three days later. narrator: but then, to the surprise of everyone, a new piece of evidence emerged. johnston: i find a 911 call, which was something that we were never aware of in the past. operator: 911. what are you reporting? ♪ narrator: about three weeks into chanin starbuck's murder investigation, detectives came upon a surprise piece of evidence -- a 911 call traced back to chanin's cellphone. you really hear just what seems to be a female voice and sort of a gurgle or a gasp or some sort of struggle. narrator: and then the call ended. why did police only learn about this vital piece of evidence now? because of a common safety feature on chanin's phone. certain cellphones at that time wouldn't record 911 calls so that if someone were kidnapped or needed to make a 911 call without a third pa