Are police officers or FBI agents who are being shot at prohibited from shooting back at their attacker, because that would deprive life without due process of law?
Can suspects not be arrested until a court case has exhausted all its appeals, because that would deprive liberty without due process of law?
The FBI (presumably) had a warrant here, after gathering evidence, and the cooperation of various other agencies including a few district attorneys. The US (hopefully) is a land in which the process of acquiring a warrant before actually seizing anything or arresting anyone is so commonplace that it isn't even mentioned. There was a process of law, it involved the courts, you didn't see it because it didn't need to be mentioned, and it didn't involve the completion of a criminal case.
(There are separate safeguards, against police officers killing people without reason, arrests happening without a warrant, or liberty or property being deprived for unreasonably long while a court case is artificially stalled. Some of those safeguards are not as effective as a free people would hope. But I don't think that's what you were referencing, and I don't think you can make a case that any of those happened here.)