Library exhibit highlights Harris County Sheriff's Office history Houston Chronicle Copyright 2012 Houston Chronicle. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Updated 09:18 p.m., Monday, June 4, 2012 From dive teams to drug busts, photos showcasing the Harris County Sheriff's Office's 175 years of history are on display at Houston's Central Library downtown. At a brief ceremony Monday, county officials said the photos showcase law enforcement's evolution. Since the establishment of the Sheriff's Office in 1837, the sheriff's role has changed, Garcia said.