she alerted when she smelled some of paul zumot's clothes. suspicious? yes. exactly ironclad evidence. as you'll see, courtesy of paul's high-profile defense attorney, the man famous for defending scott peterson. his name, mark geragos. >> i've had many a client who i have no doubt was capable of the acts that he was accused of. this is just not one of them. >>> coming up -- in the last hours of jennifer's life, something was caught on camera. does it prove paul is not guilty? >> so you had sex last night with her and videoed it? >> yeah. >> anybody who watches this is never going to have the impression that this was somebody who was ready to kill her. when "dateline" continues. when "dateline" continues. that's why i've got the power of 1, 2, 3 medicines with trelegy. the only fda-approved once-daily 3-in-1 copd treatment. ♪ trelegy ♪ the power of 1,2,3 ♪ trelegy ♪ 1,2,3 ♪ trelegy man: with trelegy and the power of 1, 2, 3, i'm breathing better. trelegy works three ways to open airways, keep them open and reduce inflammation, for 24 hours of better breathing.