MADISON, Wis. (AP) -

Officials with Gov. Scott Walker's administration say they can't find any evidence corroborating state Supreme Court Justice Ann Walsh Bradley's claims state Capitol Police set up extra security to protect her from a fellow justice.

Bradley wrote in a memo released Wednesday that Capitol Police devised a special security plan to help protect her and Chief Justice Shirley Abrahamson from Justice David Prosser in March 2011. Bradley wrote she and Abrahamson felt Prosser was prone to temper tantrums and was growing more agitated. Prosser allegedly placed his hands around Bradley's throat during an argument in her office in June of that year.

Walker's administration runs the Capitol Police. Administration spokeswoman Stephanie Marquis says she can find no record any security plan was ever implemented for Bradley and Abrahamson.