Chicago police searching for missing man, Joshua Brown, 33; left suicide note at South Loop home 6' 200 LBS male/black light complexion -- last seen Monday ... Suicide note: "Have fun, then end life" -- frequents bars in South Loop and Streeterville -- may be driving 1995 Saturn two-door, Illinois license plate JB9539 ...  Info? Call Belmont Area special-victims detectives at 312-744-8266.