tomorrow night on "48 hours" peter van zandt reports. >> mackenzie cowell of wenatchee, washington wasinterest in fashion and the performing arts. and she took courses at a local beauty school. >> mackenzie was a very energetic and motivated person. she had a schedule that was so full that i don't know how she even did it. >> reporter: on a clear and child february day in 2009 mackenzie simply disappeared. >> mackenzie cowell is a student here. it's 3:00. she leaves out this for right here. and she walks over to her car. she gets in. she drives out. she's never seen alive again. >> reporter: four days after she disappeared her body was found along the bank of the columbia river. suspect after suspect was checked out until christopher scott wilson was arrested. wilson's family hired world famous seattle defense attorney john henry brown. he once represented ted bundy and now defending robert bales. in the mid-'90s he came to wenatchee when score of adults were charged with skills sexual abuse. he succeeded in having some of those cases dropped or overturned. >> it was completely false.

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