Father Rizzo was a priest of the SSPX for few difficult years until he ultimately split with the Society and joined the Priestly Fraternity of St. Peter (FSSP). He is now serving as a priest of the Fraternity in New Zealand.
He is currently in the news having been interviewed for a story in the Boston Globe about his recollections of Bishop Williamson of the SSPX whom he knew well during his seminary years. He does not recall Williamson fondly. Here's the full story from the Globe. Those of us who knew Father Rizzo when he served in our area greatly admired his hard work and fortitude during the many difficult years for traditional Catholics. We wish him well in his work.