FEELING SMART

Eggistu, Akpors and Alinco went to rob a supermarket at night. They decided not to give an answer to any question if they were unfortunately caught. A neighbor saw them, called the police and unfortunately for them they were caught.
POLICE:     [to Akpors] What's your name? .... (There was no answer).
POLICE:     [to Alinco] What's your name? ... (He didn't respond either).
POLICE:     [to Eggistu] What's your name?
EGGISTU:     Akpors and Alinco did not mention their names, so why should I?