>> reporter: five days after denita smith's murder, detective pate drove back to greensboro with a warrant to arrest shannon crawley. she and her children were staying at her sister's house when police arrived. >> shannon comes out. they cuff her, and she walks out the door as though she's going to check the mail. >> reporter: pate says shannon did not seem surprised to see him. >> there is no sad look or anything like that. she gets to the end of the driveway. she looks at her family and says, "raise them like they're your own." >> well those are the words of a woman who does not expect to be raising her own children. >> exactly. >> reporter: shannon's family watched their daughter be cuffed and taken away. >> it was more than upsetting. i was angry. i was afraid for her. and knowing in my heart that my daughter could never, ever have done that. >> reporter: shannon was just 28. she'd never been in trouble with