Sadly it is not uncommon for an entirely innocent defendant who failed to obtain legal representation prior to police questioning to make a false confession.
An interview at a police station is a stressful and worrying experience so it is essential that you are fully aware of your rights and are able to make the decision as to how to respond.
Inaccurate answers are given in haste and out of panic which later turn out to be wrong. Many clients attempt to answer questions immediately in the belief they can talk their way out of the situation and leave as quickly as possible. This is rarely the best strategy. It is difficult to rectify these sort of mistakes after the event.