FBI has squelched Austin media and American news media from answering those questions. As citizens we don’t have the need to know who is killing our peace officers if it would embarass the FBI or Obama/Biden administration. This article (exclusive = leak) is from England, but the article says the perp was killed and says both the dead males when the shooting stopped were named something Mohammed Nasar, as I read it. The old man was also Mohammed Nasar. It says one of the sons was the perp but they didn’t know which one.
Your questions are good, apparently the feds don’t want you to get an answer.
I’m sure a full explanation will be forthcoming after the FBI finishes releasing the full explanation of the Las Vegas massacre.