Hayden Panettiere's on-and-off boyfriend Brian Hickerson was with her at the time of her death in South Carolina. Now, a neighbor from Hayden's home in Los Angeles is coming forward with disturbing claims about what she says she witnessed in the years leading up to Hayden's tragic death. Hickerson's attorney told Access that Hayden's death remains under investigation and that they had no further comment following the neighbor's allegations.