Here is an article from April 13, 1991 (Photo of Chuck Porter). This article quoted Fred Martens, executive director of the Pennsylvania Crime Commission and stated that the Pittsburgh La Cosa Nostra family at that time "was the strongest" in the state of Pennsylvania.

http://news.google.com/newspapers?nid=1144&dat=19910413&id=ASweAAAAIBAJ&sjid=7JYEAAAAIBAJ&pg=5483,5474922