A private person may arrest another —\n(1) for a public offense committed or attempted in his presence;\n(2) when the person arrested has committed a felony, although not in his presence; or\n(3) when a felony has been in fact committed, and he has reasonable cause for believing the person arrested to have committed it.
U.S. Virgin Islands Legal Code
3563
U.S. Virgin Islands § 3563 — U.S. Virgin Islands law