I disagree that his catching was inevitable. They only knew an identity yesterday. If the suspect wasn’t a coward it’s plausible they could’ve just driven away to literally any other part of the United States and then flew back to Portugal. I have no comment on the Kirk case.
As for the expectation, other than if civil liberties are going to be violated in the name of safety I expect much faster results, and I’m sure the MIT professors family would agree.