Fuhrman, of O.J. Simpson case fame, addressed those questions on The Early Show Wednesday.
Terri went into a vegetative state that lasted until she was allowed to die almost three months ago, when her feeding tube was removed.
The dispute between Terri's parents and Michael over removing that tube resulted in one of the most heated legal battles in recent memory, stretching from the White House to Congress to the Supreme Court, and even the Vatican.
In his new book, "Silent Witness: The Untold Story of Terri Schiavo's Death," Fuhrman examines the events leading up to her collapse, and eventual death.
He tells co-anchor Hannah Storm he was inspired to come to Florida to look into the Schiavo case by talk show host Sean Hannity.
"He said, 'You should investigate this,' " Fuhrman recalls. " 'You should at least come down and read everything.' So … I went to Florida and started doing just that.
"I was pretty shocked with what I read, not only from a humanitarian angle from Michael Schiavo -- he was completely absent of any compassion or empathy for the direct family of Terri Schiavo -- but there were many questions about how she collapsed … none of which have ever been answered."