The verdict was set to be read at 1 p.m. local time (4 p.m. EST) Friday.
Peterson, 32, is charged with murdering his wife Laci, who was eight months pregnant at the time of her death with her son Conner. The bodies washed ashore in April 2003 along an area of the San Francisco Bay where Peterson admittedly took his fishing boat the day Laci disappeared.