CBS 5 obtained some new information about how much money the Maricopa County Board of Supervisors said Maricopa County Sheriff Joe Arpaio may have misused.

Arpaio's attorneys said the board has a vendetta against the sheriff, but if the information in the court documents is true, $50 million could have been misused.

CBS 5 obtained court papers that showed the state Superior Court why the supervisors believe they had to issue a subpoena on Arpaio.

According to the papers, the supervisor's chief financial officer, Loretta Barkell, provided information showing almost $500,000 in taxpayer funds of misspending in just a two-week period.

The Maricopa County Board of Supervisors wants an explanation from Sheriff Joe Arpaio about why he did not turn over financial documents the board requested through a subpoena.

Read: Subpoena (.pdf)

Read: Arpaio Response

In late April, the board issued an administrative subpoena to the Maricopa County Sheriff's Office requesting financial records for their RICO, Jail Enhancement Funds and other bank account information.

Officials said the subpoena was issued after Arpaio did not produce the requested information. The board could decide to open up contempt hearings against the sheriff and MCSO.

Sheriff Joe Arpaio says he has decided not to run for Arizona governor.

"Right now, we are standing in the cross-hairs of history in this state and as sheriff of the most populous county in Arizona, there is much work yet to do," he said in a statement.

To leave this office open to appointment by the Maricopa County Board of Supervisors of an interim sheriff may very well put us on a path that would be extremely displeasing to the voters of this county," he said.