Quest to ID remains brings mystery after mudslide - Article Photos 32/36

Medical investigator Deb Hollis, left, pets therapy dog Paddy on a break as handler Christi Dudzik, center, looks on with Jennie Thommen at the Snohomish County Medical Examiner's office, Wednesday, April 2, 2014, in Everett, Wash. The office is processing the remains of victims from the March 22 mudslide in nearby Oso, Wash., that has killed at least 29. Another 13 people are unaccounted for.(AP Photo/Elaine Thompson)