By Jeff Labrecque
May 06, 2009 at 04:33 PM EDT

Kiefer Sutherland, who allegedly head-butted clothing designer Jack McCollough at an after-party for the Met costume gala late Monday night, is reportedly claiming that he confronted the designer after he witnessed him knock over actress Brooke Shields. A potential problem for Sutherland, according to TMZ, is that Shields is telling a very different version of events: Brooke’s rep said “nothing happened to her,” adding “Jack did nothing inappropriate. It’s not clear what caused Kiefer to do what he did.”

However, when asked, “Did Jack touch her?” Shields’ rep’s reported response was, “We don’t know.” Police are trying to sort out just what happened,. “All we can say at this point is that [McCollough] was the victim of a vicious,violent, unprovoked assault and that the matter is in the hands of theauthorities,” a rep for the designer told People on Wednesday.

Sutherland is still on probation in L.A. related to a DUI charge, and it is unclear whether California authorities will consider this event a violation.