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Gov. Scott Walker's former county spokeswoman has been granted immunity as part of the ongoing John Doe probe into activities during Walker's tenure as county executive.

Fran McLaughlin, now the spokeswoman for Sheriff David A. Clarke Jr., was given immunity Thursday in exchange for her testimony in the secret probe.

McLaughlin was the communications director for Walker from 2007 to 2010, when he won his first term as governor. She is the 13th individual granted immunity in the case.

Records show that McLaughlin was given immunity after she invoked her Fifth Amendment right not to answer questions to avoid self-incrimination. Earlier this month, Democratic lawyer David Halbrooks was given immunity after doing the same.

Michael A.I. Whitcomb, the lawyer for McLaughlin, declined further comment.

As part of the John Doe, prosecutors have charged three former Walker aides, an appointee and a major campaign contributor.