No they haven't. Police forces' power goes through actual Courts that enforce Constitutional rights above police authority.
ICE/Border Patrol's authority comes through civil law and non-Article III 'immigration' court. Congress explicitly authorized ICE to be something else when they placed ICE in an alternative 'civil law'/immigration system hoping to make them not have to follow the burdens placed on Police/Justice/Judges/Courts by the Constitution.
The police enforces civil law just as same as criminal law. For example, most traffic infractions are civil and don't go "through actual Courts". 'Traffic' court is not an Article 3 court. The funny thing is that a short while ago the same people that demand criminal process for illegal aliens now could not stop themselves from mentioning that immigration infractions are civil, same as traffic violations. So it's not some obscure knowledge for the left...
Do police arrests/detainments go through traffic court? Ice's day to day, reason for existing role goes through the equivalent of traffic court, not actual court with real judges putting them more on the level of meter maid than Police.
>Do police arrests/detainments go through traffic court?
I assume you meant "arrest warrants" because most arrests don't go through any court, the police employs sworn officers (same as ICE and other feds) who have a power to arrest upon a reasonable suspicion. And the police can and does serve administrative arrest warrants. I suppose those are rare from traffic courts but common from parole boards, for example.
I think I figured what your problem is. You have the whole process backwards. It's not the judge who orders the police around to catch criminals. The police catches criminals and gives them to the DA, who may bring them to court and ask a judge for a conviction. The police does not interact with courts other than testifying or serving warrants, its day-to-day business does not involve courts.
if you mean "ICE agents (as sworn federal agents) are not authorized by statue to arrest people for federal crimes, like entering the US illegally" you are simply wrong.
ICE agents, specifically those in Enforcement and Removal Operations (ERO) under U.S. Immigration and Customs Enforcement (ICE), are federal law enforcement officers with statutory authority to arrest individuals for immigration violations, including criminal offenses such as illegal entry into the United States under 8 U.S.C. § 1325 and § 1327.
It is true that many immigration violations are administrative in nature but it doesn't follow that ICE are not police, nor are they not sworn to enforce all federal laws.
If I mean that ICE operates under Immigration courts which are not real/Article III courts and that these courts skirt Constitutional rights on the claim that they are civil, not criminal, than I am, in fact, 100% correct and that ICE are not acting as Police in their main, day to day, purpose for existing capacity.
Why are ICEs training programs so significantly shorter than other law enforcement? Especially if ICE's training covers immigration enforcement and Federal law enforcement training? Shouldn't that make it longer, not significantly shorter? Can an ICE agent transfer to another Federal position (say DC Police) without having a requirement that they take ACTUAL law enforcement training?
ICE/Border Patrol's authority comes through civil law and non-Article III 'immigration' court. Congress explicitly authorized ICE to be something else when they placed ICE in an alternative 'civil law'/immigration system hoping to make them not have to follow the burdens placed on Police/Justice/Judges/Courts by the Constitution.