 He was therefore among the five councillors charged with treason by the Lords Appellant on 14 November 1387, and, on the citizens refusing to rise for him, fled, but was captured (in Wales, says Jean Froissart) and imprisoned at Gloucester, until on 28 January 1388 he was moved to the Tower.The Merciless Parliament met on 3 February, and the five councillors were formally impeached by Gloucester and the Lords Appellant.Brembre, who was styled "faulx Chivaler de Londres," and who was hated by York and Gloucester, was specially charged with taking twenty-two prisoners out of Newgate and beheading them without trial at the "Foul Oke" in Kent.