The DEA is joining the investigation into the death of actress Hayden Panettiere, according to sources familiar with the matter. New details are surfacing abou

The DEA is joining the investigation into the death of actress Hayden Panettiere, according to sources familiar with the matter. New details are surfacing about Panettiere's relationship with on-again, off-again boyfriend Brian Hickerson, who was with her when she died. [▻](https://video.twimg.co…