Hayden Panettiere's mom says narcotics investigator was called into police probe of her death NBC NewsBoyfriend Who Abused Hayden Panettiere Had Returned to Her Life The New York TimesHayden Panettiere Death Investigation Now Involves Drug Enforcement Administration: Source People.comHayden Panettiere 'left this world far too soon,' says ex-fiance Wladimir Klitschko
