Following the classic pattern of other children artists, in the mid-60's Quesazas saw his cinematographic career begin to decline as he loses the childish candor that characterized him, even so, in 1966 stars in two other films Duel of gunmen and The False Heir with Joselito.

His later films saw the total decadence with very secondary roles and even mere cameos, causing Pulgarcito to fall into a spiral of delinquency that led him to perpetrate a robbery the 20 January 1971.

Almost at the end of the day, with the face covered by a woolen balaclava and carrying a gun, Quezadas entered unnoticed a shoe store El Taconazo and to the cry of "This is an assault!"

Believing that she was dead, Quezadas was arrested and taken to the Federal District Attorney's Office, where he was interrogated and confessed his crime.

From his second marriage are his sons Gridley and Guillermo, but their relationship with Claudia would be stormy and this, designer and photographer, ends up discovering a video of Quezadas sexually abusing his daughter Mariana.