"The Dead Sea Scrolls were most likely written by the Essenes during the period from about 200 B.C. to 68 C.E./A.D. The Essenes are mentioned by Josephus and in a few other sources, but not in the New testament. The Essenes were a strict Torah observant, Messianic, apocalyptic, baptist, wilderness, new covenant Jewish sect. They were led by a priest they called the "Teacher of Righteousness," who was opposed and possibly killed by the establishment priesthood in Jerusalem."

From the www, and easily found with a Google of that paragraph.