>> reporter: marty, i've gotta say, i think that's very strange. take your grandson and, by the way, your daughter's dead. >> he was emotionless, let's put it that way. people who saw him that day claimed that he was without emotion. curtis also knew cpr. and yet, he never tried to revive his wife. >> reporter: on the day, why didn't you do cpr? >> i don't know. i don't know why i didn't do cpr. i don't know why i -- i didn't call 911. in looking back -- i -- saw my wife, cory -- dead. and i didn't know how to react. >> reporter: prosecutor parkinson next went after the first police investigation. pushing hard against detective baird who handled the case. he questioned if baird gave curtis who was then an assistant state's attorney, preferential treatment. >> he was a prosecutor. they were the police. he gave 'em a story that he -- how it happened.