Catherine Shelton: A timeline of the cases with links to the former Texas attorney

Numerous men have dropped dead around Catherine Shelton. She's never spent a day in jail. Is she responsible for any of their deaths? Journalist Jenna Jackson has been trying to find an answer to that question for years.

More than 20 years ago,"48 Hours" producer Jenna Jackson started researching an infamous Texas woman named Catherine Mehaffey Shelton and got hooked.