It sounded like a crazy idea: birth control for rats. Investigative Reporter Jodie Fleischer explains D.C. leaders aren’t sure yet if the plan is working.

It sounded like a crazy idea: birth control for rats. Since the News4 I-Team first featured the new effort by DC’s Health Department in May, people around the country have been contacting News4 to find out how the product, called ContraPest, is working. The short answer: district leaders aren’t sure yet. They recently extended the duration of the program...