Chuck Rosenthal said an unspecified condition made his memory unreliable about the 2,500 e-mails he’d been ordered to turn over as part of a lawsuit against the sheriff’s department. Other e-mails released as part of the suit led to Rosenthal’s resignation because of their pornographic, racist and political content.

“While I am seeking treatment to address these matters correctly, I am concerned and wish to ask the Court to take into account that my prior testimony and Declaration must be considered in this context,” Rosenthal wrote in a court request asking to amend some testimony.

Rosenthal’s request came on the same day Gov. Rick Perry named Kenneth Magidson, an assistant U.S. attorney in Houston, as interim Harris County District Attorney until the end of December. A new district attorney is set to be elected in November.

Magidson, Rosenthal’s temporary replacement, has been an assistant U.S. attorney in Houston since 1983. He served as a Harris County assistant district attorney from 1977 to 1983.  On Friday, Magidson promised to restore the public’s trust the DA’s office.

“My main purpose in being here today is to address the people of Harris County and tell them that I expect, and this office expects us to uphold their trust and faith that they put in us,” Magidson said. “We are going to run this office in a professional manner that will seek justice (and) we expect to provide quality legal representation while maintaining the integrity of the judicial system.”

As a federal prosecutor, Magidson has been coordinator of a task force that targeted drug trafficking and money-laundering organizations operating in Texas, Oklahoma, New Mexico, Arizona, and California. In Harris County, Magidson handled major felony crimes.

Voters are set to elect a new district attorney in November’s general election.

Kelly Siegler, one of Rosenthal’s former top prosecutors, and former judge Pat Lykos will square off in an April 8 runoff for the GOP nomination. The winner will face former Houston Police Chief C.O. Bradford, the Democratic nominee.