Published: May 10, 2010 11:16 PM EDT

CAPE CORAL, Fla. - It has been 20 years since the murders of 11-year-old Robin Cornell and 32-year-old Lisa Story.

Cornell and Story were found sexually assaulted and suffocated in their Southeast 12th Avenue home.

Authorities continue to follow leads in the case, but thus far, police have been unable to track down the assailant.

The cold case has been featured on America’s Most Wanted on two occasions: in January 2006 and July 2007.

Anyone with information in the case is urged to call CrimeStoppers at 1-800-780-TIPS.