Hayden Panettiere’s ex-boyfriend Brian Hickerson has reportedly met with the Drug Enforcement Administration amid their investigation into her death. Hickerson spoke with the DEA, sources told TMZ Thursday. Authorities believe someone sold the “Heroes” alum drugs which might have caused her death, and the federal law enforcement agency is “zeroing on a potential dealer,” according to the report. Hickerson was snapped outside of his Los Angeles home for the first time while making a stop at a liquor store Thursday, in pics obtained by Page Six. Despite the hot weather, he covered up in a gray hoodie — putting the hood up over his baseball…
