multiple times, including the sheriff's department. >> is it possible that rebecca was depressed and you missed it? >> no. >> reporter: in march 2018, the wrongful death lawsuit began in san diego. defending adam was dan webb, a former u.s. attorney and a veteran of many courtrooms. >> there will be no evidence that shows that adam shacknai had anything to do with the death of rebecca zahau. >> reporter: in particular, no dna or fingerprints from adam were found at the death scene. plaintiff's attorney keith greer called several experts who testified the lack of physical evidence could show adam cleaned up after himself. >> there was nothing on the doorknobs whatsoever, as far as prints. >> again, that's conclusive with being wiped down? >> yes. >> reporter: and a handwriting expert who looked at that message on the door. >> the writing on the door is more -- [ inaudible ]