““Why” - that’s when reporters say “unknown motive” or “domestic incident” etc. In this case “motive to be determined”.
Which is useless verbiage, when they are reporting on a shooting, knifing or whatever. No one really knows why the killer’s killed unless they bought a billboard telling why they killed someone.
So you think unless a guy TELLS you the motive for killing his wife caught in bed with another man, you don’t know?
I think the motive of someone yelling “Allahu Akbar” while mowing down pedestrians is self evident.
In this case, if the victims turn out to be relatives then it’s a domestic dispute even if the perp doesn’t say so.
He was high on dope and they let him go?
http://hosted.ap.org/dynamic/stories/U/US_CENTRAL_MICHIGAN_UNIVERSITY_SHOOTING?SITE=AP&SECTION=HOME&TEMPLATE=DEFAULT