FBI search for Drew Peterson's missing 4th wife turns up empty, sister continues hunt with sonar

Another law enforcement search for the body of Stacy Peterson, a Chicago-area mother of two who remains missing since her disappearance 14 years ago, turned up empty Tuesday after the woman’s sister said she submitted a tip back in May about supposed skeletal remains located in a canal.

Diving teams entered the water Tuesday five months after Cales said she submitted a tip in May that her privately employed sonar search crews captured video of supposed skeletal remains in the Des Plaines River near the Lockport Powerhouse, which is a power station north of Joliet, Illinois. 

"I'm not going to stop. If you want it done right, you have to do it yourself," Cales told Fox 32 Chicago.