In a startling revelation, the FBI investigated whether reality TV vixen Anna Nicole Smith was part of a plot to kill her tycoon husband's son, whom she was battling for his late dad's multi-million dollar fortune.

Despite the investigation, prosecutors ultimately decided there was not enough evidence to charge the former Playboy Playmate with any wrongdoing.

• TAGS

• Anna Nicole Smith
• E Pierce Marshall
• Estate
• FBI Investigation
• FoIA
• J Howard Marshall II
• Playboy Playmate
• Redacted Documents