In 2008 during the Gilbert Simental trial in California it was ruled that jws have no clergy privilege since confidentiality was not a priority. The elders do, after all, report confessed wrong doing to the Watch Tower. Here are a bunch of articles about this case.
http://www.silentlambs.org/ElderprotectPedophile.htm
This article from September 2015 says that Lindhirst admitted his crime and was sentenced to six years in prison. It doesn't mention the elders' reporting on him.
http://www.sanluisobispo.com/news/local/crime/article39062517.html