A Brutal Officer.Elt; I it or Courier:—Last night I witnessed, an outrageous exhibition of cowardly brutality and idiotic incompetency on the part of a police officer that ought to insure his instant removal. But it won’t. Competence, courage and discretion are qualities apparently not wanted in a policeman under the jimking regime.I saw Officer Estaque unmercifully club John Lock man, a poor, crazy fellow, for uo other apparent reason than just because he could do it without danger to himself.Kstaque knew the man; has known him aud lived almost neighbor to him for years. He knew him to be a harmless, inoffensive man, subject at times to attacks of insanity. There were fifty men present on whom the officer could have called for assistance. With the help of one man he could have run his man in easily and quietly. He neither asked for assistance from the bystanders nor signalled for help from his brother officers, but wantiug, I suppose, the glory of makiug this important arrest “all by himself,” he proceeded to club the helpless man into subjection. The sound of the blows were heard clear acrosB the square, and finally the prisoner was dragged to the station, and thrust, raving, into a cell, without any attention to his injuries, his head cut open and he covered with his own blood.Right.