search warrant now revealing police are investigating that corwin, three months pregnant, and her neighbor, christopher lee, were having an affair. investigators fearing the worse, calling the circumstances surrounding her disappearance suspicious. >> we're looking for a crime scene. we're looking for something that's going to give us an indication that something has or has not happened to her. >> reporter: erin corwin, the wife of a marine, has not been seen in nearly a month. vanishing from twentynine palms in june without a trace. investigators say her husband, lance corporal jonathan corwin, reported her missing one day after she was last seen leaving for joshua tree national park. the search warrant revealing, lee says he went hunting in joshua tree the same day, but he denied seeing her there. according to the search warrant, lee, a marine rifleman, who was recently honorably discharged, initially denied knowing erin corwin well, but investigators say corwin's friend told them she might have been pregnant