You are not allowed to detain people. That is called kidnapping and is a federal crime.
I can't detain a bank robber, rapist, arsonist if I am able to for the police to take custody? When was that law passed?
Please cite this law.
You should find out what kidnapping really is. Here: I'll give you a hand since you are so stupid and such a simpleton.
"Generally, kidnapping occurs when a person, without lawful authority, physically asports (i.e., moves) another person without that other person's consent,
with the intent to use the abduction in connection with some other nefarious objective. Under the
Model Penal Code (a set of exemplary criminal rules fashioned by the American Law Institute), kidnapping occurs when any person is unlawfully and non-consensually asported and held for certain purposes.
These purposes include gaining a ransom or reward; facilitating the commission of a felony or a flight after the commission of a felony; terrorizing or inflicting bodily injury on the victim or a third person; and interfering with a governmental or political function (Model Penal Code § 212.1)."
kidnapping
You tell me how holding law breakers for the Border Patrol is a "nefarious objective". I mean, it probably is in your opinion
and that of other shitbag leftists because it thwarts people who are entering the country illegally. But is enforcing US federal law a "nefarious" criminal objective?
I doubt even you are that stupid that you can't figure that one out.