A source who spoke to several justices present during the incident told the Journal Sentinel that the confrontation occurred after 5:30 p.m. June 13, the day before the high court's release of a decision upholding a bill to curtail the collective bargaining rights of public employees.
Six of the court's seven justices - Justice N. Patrick Crooks was not present - had gathered in Bradley's chambers. Some were informally discussing the decision.
The conversation grew heated, and Bradley asked Prosser to leave. Bradley was bothered by disparaging remarks Prosser had made about Chief Justice Shirley Abrahamson, a source said.
Bradley felt Prosser "was attacking the chief justice," the source said.
Before leaving, Prosser "put his hands around her neck in what (Bradley) described as a chokehold," the source said.
"He did not exert any pressure, but his hands were around her neck," the source said.
The source said the act "was in no way playful."
But another source told the Journal Sentinel that Bradley attacked Prosser.
"She charged him with fists raised," the source said.
Prosser "put his hands in a defensive posture," the source said. "He blocked her."
In doing so, the source said, he made contact with Bradley's neck.