A Camden man was arrested Friday night after drugs were allegedly found in his vehicle during a traffic stop on the White Horse Pike, police said. Manuel Rosa, 41, is being held in the Atlantic County jail. Officers stopped a 2006 Mercedes Benz on the pike near Quince Avenue at 10:19 p.m. and requested a police K-9 after suspecting criminal activity, police said Monday in a Facebook post. Large quantities of marijuana and ecstasy were found.