US military 'conducted a lethal strike' on alleged 'drug vessel' in southern Caribbean, Rubio says

[DUU]

29. Here is how I expect they did this

I was a USCG contractor a decade+ ago and saw something similar. Look up DOD 3025.21 Defense Support of Law Enforcement, 2013 for the background.
Presidential legal findings (from Bush and Obama) have found it legal to put a USCG officer on a USN asset (usually a smaller vessel(s) like a destroyer). When the area of operations is reached, the Navy captain steps down and the Coastie assumes temporary command of the ship, while in communication with appropriate USCG Chain of Command.
During this period, any capability, weapon or personnel are under the control of the USCG and not USN. I expect what we read today was under similar circumstances and control, avoiding direct challenge to the Posse Comitatus act.

(PS: Don’t shoot the messenger I’m just providing a historical perspective)