Further investigation is underway into the death of actress Hayden Panettiere. A federal agency is now involved, with a source providing information about the case. The agency enforces drug laws and has previously been part of similar investigations.

Details about the death include attempts by emergency responders to revive the actress. These efforts were unsuccessful. The circumstances surrounding her death are still being examined.

More information about the investigation and the events surrounding Panettiere's death can be found through other sources.