Biography
David Benson was a young CNVA peace activist from Morgantown, West Virginia, active in Massachusetts. He destroyed a draft document at the Boston Army Base protest of March 25, 1966 and burned his classification notice with three other protesters on March 31. A hostile crowd attacked the protesters.
Sources: https://newspapers.swco.ttu.edu/bitstreams/ec913415-a182-4937-9632-2b825dd1f9a3/download#page=3 ; https://dailyiowan.lib.uiowa.edu/DI/1966/di1966-04-01.pdf
Actual Petersburg custody in June 1967
The June 19, 1967 CNVA newsletter reports a family visit to David Benson and Tom Rodd at the federal prison in Petersburg, Virginia. It describes Benson as expecting his parole request to be denied. That is evidence of actual custody by the report, not an exact admission or release date. The separate June 26 parole forecast concerns Rodd, not Benson, and is not recorded as an actual release for either man.