LOUISVILLE, Ky. (WDRB) -- Four women arrested for several thefts at area hospitals and doctor's offices have pleaded not guilty.

Police say the sisters stole wallets and charged thousands of dollars worth of items on credit cards they stole.

The thefts date back to November 2012, but police believe there may be many other victims.

"The allegations are such that they were preying on people when they are at their most vulnerable," says Jefferson County District Court Judge David Holton.

Officers are still searching for three others who may be involved in the thefts.

Copyright 2013 WDRB News. All Rights Reserved.