They knew. they know exactly what they are doing. They cause brain damage through exposure to mycotoxins then apply torture until the person is broken down. Mycotoxins break down the mind and weaken the body.
Torture, Pavlovian conditioning systems. Classical conditioning. Then behavior modification a reformatting of the personality.
All of this causes the victim to not want to tell thier story or reveal information, either that or they actually lose memory due to brain damage. Or at least amnesia is re induced by these methods.
Its that simple what they have done...