TMZ is citing multiple law enforcement sources with “direct knowledge” that Hayden Panettiere may have taken a blackmarket Oxycodone pill laced with fentanyl the morning of her death.  Those same sources say police are looking into her long time drug dealer in Los Angeles and are trying to trace the pill back to him.   Meantime, Panettiere’s on-again, off-again abusive boyfriend made headlines of his own over the weekend.  Brian Hickerson and his brother Zach were reportedly highly intoxicated when Zach was ultimately arrested for disorderly conduct, as Brian shouted at police that they “leaked it when my girlfriend died.”