From NPR:
There’s plenty of precedent for allowing non-citizens to sit in judgment, said UC Irvine political science professor Louis Desipio. Most states in the 19th century allowed permanent residents to serve on juries, and even vote. “In the old days, we understood the period of permanent residence as one where immigrants were citizens in waiting, or citizens in training,” Desipio said. The practice ended as laws became more restrictive.

Full transcript not available. Audio link available at http://www.scpr.org/blogs/politics/2013/08/26/14587/governor-brown-consi....