WHO KILLED MARK STEVEN SCOTT?

According to https://it.findagrave.com/memorial/101235583/mark-steven-scott , student Mark Steven Scott was killed by Dante’s law of retaliation inside the home of Dean Corll in 925 Schuler (=student ) Street in Houston, Texas, after being lured by accomplices Elmer Henley and David Brooks. The official side of the story reports that it was Henley who strangled Mark, then

WHO KILLED SYLVIA LUCILLE NEWMAN GREGORY?

According to https://www.wccbcharlotte.com/2018/04/10/cold-case-files-month-marks-46-years-since-sylvia-newman-disappeared-north-charlotte-later-found-dead/ , 22-year-old Syliva Lucille Newman Gregory had been a resident of 3631 Havenwood Drive near Bonneville Drive in Charlotte, North Carolina and was abducted and killed on April 18, 1972 inside the trailer where she and her husband lived on Mallard Creek Road. Blood and glasses were found in the trailer. The