Some would argue this has a larger application (not really)
Why should a brain defect give a man the right to again run free and murder another?
The problem is there is probability but not absolute proof: the researcher himself had a brain close to murderers, and the power this gives to murderous governments is too great. As in the Bible, evidence 2 or 3 eyewitness for capital crimes , with false witnesses receiving the penalty their false testimony incurred), we must wait till the crime occurred.
Then I hammered it home again in my last paragraph.
Was I not clear?
One must have the predisposing factors AND HAVE ACTED ON THEM to earn permanent removal from society.