Provisions relating to the Mode of Arrest in the US have been laid down under Title 18, Chapter 203 of the US Code.
In case of any offense committed against the United States, the wrongdoer may be arrested and imprisoned vide the provisions in chapter 207 of Title 18 of the US Code. After such arrest is made, the copies of the process is returned at the earliest into the office of the court clerk along with the name of the witnesses for their appearances to testify in the case.
It can be mentioned here that such arrest can also be made by “any justice or judge of the United States, or by any United States magistrate judge, or by any chancellor, judge of a supreme or superior court, chief or first judge of the common pleas, mayor of a city, justice of the peace, or other magistrate, of any state where the offender may be found, and at the expense of the United States.”
Any state judge or magistrate of the US may carry on according to the customary method of modus operandi of the particular state concerned, but his orders have no consequence beyond determining, in respect to the provisions of section 3142 Title 18 of the US Code.
(More:http://www4.law.cornell.edu/uscode/html/uscode18/usc_sup_01_18_10_II_20_203.html)
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