Deep cover-up in Guerrero: Murdered Armando Chavarría's file disappears

A new and drastic turn in the investigation of murdered PRD politician Armando Chavarría, who was head of Guerrero's state congress, and likely would have been governor now had unknown assassins not executed him in his car, right in front of his house.

Now, Alberto López Rosas, who is head of the Guerrero prosecutor's office, informed that the expediente or file that contained the details of the investigation into Chavarría's murder, has simply disappeared. 

It should be recalled that less than a month ago,  now ex-governor Zeferino Torreblanca claimed the case to be "99 percent solved." 

What is Torreblanca, who clearly seems to be the ultimate responsible for the disappearance of the papers, hiding?