CBP’s monthly reports use “released” to mean cases in which U.S. Border Patrol did not transfer an apprehended noncitizen to another detention authority or removal pathway but instead allowed them to remain in the U.S. (for example, formal paroles or discretionary releases such as "Notice to Appear - Person Released" or other provisional releases). CBP’s Custody & Transfer and USBP disposition tables list the specific processing dispositions counted as releases (e.g., Paroles; NTA‑Person Released; Notice to Report; Provisional Releases), so when CBP reports “zero releases” it is reporting zero entries in those release/parole categories for the period.