He was apparently much more gifted than she was (he was a brilliant violinist as well as gifted in the sciences) and they had had some conflict over this.
That said, however, it’s possible that her killing her brother was an accident. Many people handling a gun for the first time don’t realize how dangerous it is and the fact that you should never ever point it at anyone.
Well, from some posts it sounds like she might have been an affirmative action hire or something.
Read the link:
She not only fired three times, but she threatened a motorist on the street and apparently the cop that busted her had reason to be very careful.
So she was incompetent in handling a weapon?
Killing three people who are no doubt taking some evasive action with a revolver and wounding others is no mean feat.
She knows how to shoot.