Virtually all criminals lie.
Lying is a common tactic used by criminals to conceal their identities, their backgrounds and their crimes. They lie to cover their tracks, to evade detection and to escape from the reach of the “long arm of the law.”
This is why suspects who are taken into custody are fingerprinted and photographed, to attempt to make certain that the name the suspect provides is truly his/her name. Often criminals use multiple false identities whether by committing identity theft or fabricating altogether fictitious identities.