Biography
Reggie Robinson is individually documented in Charles Payne’s history of civil-rights-related custody in Mississippi.
Payne identifies Robinson among the Freedom Riders who had been released from jail before joining the McComb movement in 1961. The mid-August group arrival context does not establish his individual jail-admission or discharge date. The account supplies no numerical actual duration.
Sources: Charles Payne, I’ve Got the Light of Freedom (2007 edition), original PDF page 93.