Alcor and the whole idea of cryonics has been mired in controversy for years. The company was the subject of the 2009 book "Frozen: My Journey Into the World of Cryonics, Deception and Death," by former Alcor employee Larry Johnson.
Johnson charged that Alcor employes whacked Williams' head with a monkey wrench like they were hitting a baseball.
Last year, Johnson told "Nightline" that he was horrified to have watched Alcor employees in the operating room, working on a deceased client.
"It was barbaric ... the third suspension that I witnessed, they actually used a hammer and a chisel," he said. "I actually witnessed them remove her head with a chisel and a hammer."
Alcor has denounced Johnson's interview with "Nightline" and his book, calling his actions "inexcusable and indefensible" in a statement on the company Web site.