The family of Laci Peterson says they will gather this evening in private to pray for their missing daughter´s baby boy. Peterson was due to give birth today. A weekend search for Peterson turned up no new evidence. Modesto Police Sergeant Ron Cloward says investigators are aware that Peterson´s due date has arrived. He says it does not change anything police are doing to investigate the case. Peterson disappeared Christmas Eve. Her husband, Scott Peterson, says he found her missing when he returned from a fishing trip to the Bay Area. Police say Peterson was having an affair — but they have not identified him as a suspect.