Of 1st degree murder of Laci and 2nd degree murder of Conner. Had to edit, I didn't hear it properly when it was announced. Peterson guilty of murder A recent photo of Scott Peterson. A jury found Scott Peterson guilty of first-degree murder in the death of his wife, Laci, and of second-degree murder in the death of their unborn son today. The verdict reached by the six-man, six-woman jury leaves Peterson facing a possible sentence of death or life in prison without parole.