Perez, 16, had been three months pregnant, and apparently fell unconscious when she heard a burst of gunfire near her home in La Entrada, western Honduras.
When she began foaming at the mouth, her parents - who thought she was possessed by an evil spirit - called a local priest who attempted to perform an exorcism.
Perez was rushed to hospital when she became lifeless and was soon pronounced dead by doctors three hours later. She was buried wearing her wedding dress.
Mr Gonzales was visiting his wife's grave 24 hours after her funeral, when he says heard screaming coming from inside the tomb.
By the time relatives and cemetery workers were able to break through the concrete and transport Perez, still in her coffin, to the hospital, it was too late. Medics again pronounced her dead.
Doctors believe that Perez suffered a severe panic attack brought on by the gunfire, which temporarily stopped her heart. They said that it is also possible that she had a cataplexy attack, which is an abrupt loss of voluntary muscle function triggered by extreme stress.
Maria Gutierrez, Perez's mother, believed her daughter was buried alive, and blamed doctors for being too quick in signing a death certificate. "She didn't look like she had died," Ms Gutierrez said.
Perez was later reburied in her original grave.