I give odds that as soon as the dust settles, true to form he will claim to be mentally ill. When Muslims get caught during terrorist acts, they will often claim a mentally ill defense, because that, while real mental illness is shunned in Muslim countries, *faking* mental illness to avoid punishment by infidels is seen as “crafty”.
While this might work in Europe, however, back in the 1960s in the US the mental illness defense was so overused that it is now terribly hard to prove. There is also the finding of “mentally ill but guilty”, that still puts them in prison.
Islam is codified, institutional mental illness. When they admit to that, I’ll think about accepting mental illness as a defense.