Sign up for The Brief, The Texas Tribune’s daily newsletter that keeps readers up to speed on the most essential Texas news. HOUSTON — Prosecutors on Tuesday agreed to drop the securities fraud charges facing Attorney General Ken Paxton if he performs 100 hours of community service and fulfills other conditions of a pretrial agreement, bringing an abrupt end to the nearly nine-year-old felony case that has loomed over the embattled Republican since his early days in office.