Schiavo had his reasons for wanting Terri dead. Money and his new love.
That's motive.
"Schiavo, a Clearwater respiratory therapist, lives with a woman to whom he had been engaged for five years, but his marriage still puts him in a favorable financial position.
Under Florida law, Schiavo will inherit his wife's money when she dies. Had he divorced her and let her parents become her guardians, there's a chance he would get nothing and possibly have to give up some of the money he was awarded from the lawsuit."
Tampabay Fund for Schiavo s medical care dwindles
Unless someone is really poor - $300k ain't that much.
People kill for less.
An accusation isn't proof and his wife was already gone.