Do small populations of wolves still exist in Mexico?

The following reports indicate that as late as 1985, small populations of Mexican wolves were  present in the wild in the Mexican states of Chihuahua, Durango and Sonora and suspected also to be present in the state of Zacatecas. The question is, are they still present there today?  Are the wolves that have been released into Arizona and New Mexico hybridized with dogs?

As late as 1987, evidence of suspected wild Mexican wolves was found in southern Arizona.

We thank biologist Dennis Parker for supplying these three documents and the photos in the last link.

Mexican wolf field study, Dennis Parker 1987

1997 lineage factsheets for Aragon, Certified, Ghost Ranch wolves

Mexican wolf, partial transcript symposio sobre lobo mexicano

Photos: Mexican wolf, male founder of Ghost Ranch lineage