The Arizona Republic says he’s indicting Don Stapley and Mary Rose Wilcox on separate charges:

A grand jury indicted Wilcox on allegations that include perjury, forgery and conflict of interest related to votes she made as a supervisor to fund the Hispanic non-profit group Chicanos Por La Causa, Thomas said.

Stapley’s counts include fraud, theft, perjury and forgery largely related to the use of funds Stapley received in his effort to become president of the National Association of Counties. Stapley also obtained mortgage loans under false pretenses, Thomas said.
[…]
Thomas said the counts were based on Wilcox obtaining five different loans through Prestamos, the lending arm of Chicanos Por La Causa, and continuing to approve funds for the organization in her role as supervisor without filing any type of conflict notice.

Farther down, the paper notes:

The indictments from a Maricopa County grand jury are the latest allegations Thomas and Sheriff Joe Arpaio have leveled against county elected officials and administrators, many of which have been dismissed. Despite the history of Thomas and Arpaio’s allegations against other county officials petering out as they work through the justice system, the sheriff maintained confidence in his investigations.

“Let’s wait to see what the criminal justice system does before you start criticizing my investigations,” Arpaio said.