kaitlyn conley uses. narrator: analysts searched kaity's devices and found that large amounts of data had been deleted from her cellphone shortly after mary's murder. however, in a twist that would upend the investigation, adam claimed he and kaity briefly reunited after mary's murder. during this period, kaity backed up her phone on adam's computer, and almost all her deleted data was there. martino: it was the light-bulb moment. it brought back thousands of pictures and images and screenshots. scotti: there was -- several searches had been done regarding colchicine. one talked about the cardiac impact of colchicine. another talked about how you treat people who have been poisoned by colchicine. narrator: by this time, the unknown female dna found with the bottle of colchicine in adam's car was matched to kaity conley. in june of 2016, she was charged with second-degree murder. at trial, prosecutors argued that she had planned mary yoder's murder for months. this is a well-planned-out, cold, calculated t