www.hawaiifiveoonline.com McGarrett tracks down August March, a former diamond smuggler, to help clear his sister when she’s arrested for smuggling conflict diamonds. Hawaii Five-O s12e19 Hawaii Five-O S12e19 s12e19 S12e19 12×19 Season 12 episode 19 tv shows S12 s12 se12 e19 ep19 12×19 4…