Payroll records will show who worked that day but not necessarily which team they're on. And I'd be surprised if these guys always team up the same way.
Yes.
I wouldn't absolutize my use of the word "payroll". It was substantially (though not entirely) metaphorical.
My allusion: a U.S. government $paycheck is a license to kill.
But the duty roster should suffice.
Whether the shift is divided into individual teams, with individual squad commanders, I'm not certain. BUT !
They are likely to operate for what they are, a paramilitary organization. That includes rank, and that means chain of command.
note:
I understand your skepticism / doubt here S2.
My reason for not sharing it is decades of semiconductor clean-room experience.
What I learned was:
when new to that environment, being able to see only the eyes, all else is covered, including shoes, hands in gloves, made it initially difficult to distinguish one co-worker from another.
But after a while we developed the skill to identify individuals based on details neophytes missed:
- height
- gait
- etc.
In the ICE / Minnesota case, don't believe the lie.
If the ranking member of such an ICE team tells you s/he doesn't know which team member "did that", s/he's lying, or stupid (below competence level, and must be reassigned). And in that case, the second in command can provide the information.