But I don't understand the distinction in "kinds of murder" that you are describing; murder is always a felony and "misdemeanor murder" is a term of art not describing an actual statutory offense (https://en.wikipedia.org/wiki/Misdemeanor_murder). Nor can I see how the "narrow jurisdiction" of ICE is relevant here, given that it includes (https://www.law.cornell.edu/uscode/text/8/1357):
> (a)(5) to make arrests — (A) for any offense against the United States, if the offense is committed in the officer’s or employee’s presence
Obstructing federal officers in their duty is a federal offense, and it necessarily occurs in the presence of those officers.
Anyway, given the evidence I find it quite clear that the threat was "objectively reasonable in the circumstances" (i.e., with the available information in the moment, without benefit of hindsight and given the time pressure).
“Felony murder” is not “murder which is a felony” but “murder where malice is established not by, by the fact that the death was the consequence of the commission of a felony by the perpetrator, rather than by intent to kill or any of the other alternatives”.
> Obstructing federal officers in their duty is a federal offense
There is no reasonable case, based on any of the video I've seen, continuously from before to through the incident, to be made that she could reasonably be perceived to have been doing that when they exited their vehicle and accosted her.