JACKSONVILLE, Florida, Dec. 12 -- The U.S. Attorney for the Middle District of Florida, Roger B. Handberg, issued the following news release: United States Attorney Roger B. Handberg announces that Jason Laquwan Callum (43, Jamestown, SC) and Rodney Leandro (49, Jacksonville, FL) have pleaded guilty to conspiring to distribute cocaine. Callum faces a maximum penalty of life in federal prison for conspiring to distribute 5 kilograms or more of cocaine. Leandro faces a maximum penalty of 40 years  more