100 years ago, on September 1st, 1918, the Glen Rock Police Department (GRPD) was officially organized. This is not to say that Glen Rock was a lawless place before that date, but the growth and needs of the new borough, incorporated in 1894, made it impossible for the part-time marshals to cover the entire area as before. Glen Rock's population had swelled from just 613 in 1900 to 1,790 in 1915; more people means more conflict plus when you add greater numbers of the newfa