v. 25B6; verb
they were detained for questioning : HOLD, take into custody, take (in), confine, imprison, lock up, put in jail, intern; arrest, apprehend, seize; informal pick up, run in, haul in, nab, collar; Brit. informal nick.
don't let me detain you : DELAY, hold up, make late, keep, slow up/down; hinder, hamper, impede, obstruct.
release.