Mexico has admitted a basic mistake in a claim by the army to have captured the son of the country's most wanted drug lord, Joaquin Guzman.
Officials now say the man paraded in front of the media on Thursday, was in fact a used car salesman and not Jesus Alfredo Guzman Salazar, whose father leads the Sinaloa cartel.
The attorney general's office said the arrested man was in fact Felix Beltran Leon, a car salesman.
The BBC reports a lawyer claiming to speak for the Guzman family ssued a statement denying that the suspect in custody was the drug boss's son.
Mr Leon's mother then spoke to journalists and denied any link to Joaquin Guzman or the Sinaloa cartel.
The government admitted it had made a huge mistake after identity tests were carried out.
A BBC correspondent says the incident is a major embarrassment for the administration of President Felipe Calderon.