Guerrero: The wife did it, or persecution of Armando Chavarría's widow?

I've written before about the murder of PRD legislator Armando Chavarría in Guerrero last year.
Now, another turn of events: The state prosecutor's office have ordered an investigation of the assets of Chavarría's widow, Martha Obeso Cázares, specifically properties in her name. One of the lines of investigation of Chavarría's  murder is, to be sure, that his wife did it, though so far no evidence has surfaced in public. Obeso Cázares claims it is a pure persecution by the attorney general's office and Governor Zeferino Torreblanca, with the aim to intimidate her and to divert the investigation of the real killers.
Did Chavarría's widow really do it? Or is this just the revenge of Torreblanca for all her critiques of him, his administration, and the investigation of her husband's murder?