March 2, 2012 (El Cajon) -- A man acting "irrationally" who refused to put down knives when asked was shot in the arm by an El Cajon Police Sergeant, Lt. J.D. Arvan reports.  The incident occurred shortly after 9 a.m. Thursday in the area of Villa Crest and Pepper Hill, after police received calls reporting a suspicious person in the area.  Callers believed he might be casing homes in the neighborhood.