GRAMMY-WINNING MUSICIAN MARC COHN SPEAKS FOR THE FIRST TIME ABOUT LAST WEEK'S CARJACKING ATTEMPT THAT LEFT A BULLET LODGED IN HIS HEAD, ON "20/20," AIRING FRIDAY, AUGUST 19 ON ABC

Plus: Women Who Marry Prison Inmates; Do Parents Have a Right to Spy On Their Kids? John Stossel Reports; Snooping on Loved Ones

Grammy Award-winning singer-songwriter Marc Cohn gives a harrowing first-hand account of surviving being shot in the head during a carjacking attempt last week following a sold-out concert performance in Denver, Colorado. "I touched myself and it was blood all over my hands. And my clothes. And I realized I was the one who'd been hit... every second that passed by I thought, 'that's the last one, that's the last second I'll be here,'" says Cohn, who won the Grammy for Best New Artist in 1992 and is well known for his hit songs "Walking in Memphis" and "True Companion." He is married to ABC News Anchor Elizabeth Vargas, who is also interviewed about the frightening ordeal. Cohn's band members, who were in the van during the shooting, also give their accounts. A rescue worker and a doctor both tell "20/20" that, given the placement of the bullet, Cohn is lucky to be alive. Cohn tells his story for the first time on "20/20," FRIDAY, AUG. 19 (10:00-11:00 p.m., ET) on ABC.

Excerpts will be released later today. For information, please call (212) 456-1624 or e-mail alyssa.z.apple@abc.com

Also: Since arriving at San Quentin in March, Scott Peterson has received several marriage proposals, and both Erik and Lyle Menendez, who murdered their parents, got married behind bars. Yet it's not just the infamous inmates getting married - there are dozens of websites that connect prisoners with potential mates, and hundreds of prison weddings take place every year, including some that will likely never be consummated because of varying state laws regarding conjugal visits. So why would anyone marry a known killer? ABC News correspondent Lynn Sherr talks to two women who married convicted killers -- and to forensic social worker Janet Warren, who studies prison relationships, and Warden Burl Cain of the Louisiana State Penitentiary -- for insight into prison marriages.

And: How far is too far when it comes to spying on your kids? That's just what "20/20" co-anchor John Stossel questions in his report on the great lengths parents go to these days to snoop on their kids... placing cameras everywhere in their homes and tracking the internet to make sure the kids are not doing what they shouldn't be doing. Stossel talks to parents who spy and to children who are spied on, as well as to experts with strong opinions on snooping (originally aired May 2003).

Plus: With cell phones and digital personal planners, it's easier than ever to stay in touch with loved ones. But as ABC News correspondent JuJu Chang reports, it's also easier to snoop on them, (originally aired December 2004).

"20/20" is anchored by Elizabeth Vargas and John Stossel. David Sloan is executive producer.