NEW YORK—U.S. prosecutors on Monday expanded their criminal case against Ghislaine Maxwell, saying the British socialite helped procure a fourth girl for the late financier Jeffrey Epstein to sexually abuse. An amended indictment against Maxwell now covers alleged crimes stretching from 1994 to 2004 in New York and Florida, including accusations that she paid the girl, known as Minor Victim-4, hundreds of dollars for each sexual act with Epstein. Maxwell, who was Epstein’s longtime associate and former girlfriend, faces new charges of sex trafficking conspiracy and sex trafficking of a minor in the eight-count indictment, as well as earlier charges that include perjury. She had previously pleaded not guilty to helping Epstein recruit and groom three teenage girls for sex between 1994 and 1997 in New York. Maxwell, 59, has been held in a jail in Brooklyn since her arrest last July. Lawyers for Maxwell did not immediately respond to …