An Atlantic City man accused of repeatedly headbutting a police officer while being taken into custody has pleaded guilty to aggravated assault on a law enforcement officer and a weapons charge.Nashid Seymore, 31, pleaded guilty to aggravated assault on a law enforcement officer and fourth-degree unlawful possession of a weapon, according to the Atlantic County Prosecutor’s Office.The plea agreement calls for a recommended sentence of one year in New Jersey State Prison.The charges stem from two separate incidents in Atlantic City earlier this year.