Apr.04, 2010, 11:04 PM PDT

All six people named in a complaint connected to a San Jacinto corruption probe have now entered not guilty pleas to charges they funneled money into election coffers, were secretly reimbursed, and lied about it to a grand jury.

They are scheduled for a May 21 preliminary hearing.

The six defendants are related to either San Jacinto City Council member John Mansperger or to Nancy Ayres, a San Jacinto Unified School District school board member.

Mansperger and Ayres are two of the nine defendants named last November in a 155-count corruption indictment.

The indictment alleges that four San Jacinto City Council members -- Mansperger, Jim Ayres, James Potts and Dale Stubblefield -- along with four developers, were involved in money-laundering, tax fraud, perjury and filing false government documents.

All have pleaded not guilty.

Jim Ayres is Nancy Ayres' husband.

In December, a separate case was filed against the six family defendants.

Carol Ann Gehrum, mother of Nancy Ayres, entered her not guilty plea Tuesday, the last of the defendants to do so.

The remaining defendants in the complaint include Shanda Lynn Mansperger, the wife of John Mansperger; Marcia Lynn Mathews, the sister of John Mansperger; Kirk William Mathews, husband of Marcia Lynn Mathews; Christopher Ray Mason, Mansperger's nephew; and John Richard Gehrum, who is Nancy Ayres' brother and the son of Carol Ann Gehrum.

They are charged with making illicit political contributions to Jim Ayres' 2006 state Assembly campaign, although the money came in 18 months after he lost the primary.