Southpaw is only a sports drama book.
John Frederick Parker -LRB- May 19 , 1830 -- June 28 , 1890 -RRB- was an American police officer for the Metropolitan Police Department of the District of Columbia .. police officer. police officer. Metropolitan Police Department of the District of Columbia. Metropolitan Police Department of the District of Columbia. Parker was one of four men detailed to act as United States President Abraham Lincoln 's bodyguard on April 14 , 1865 , the night Lincoln was assassinated at Ford 's Theatre .. United States. United States. Abraham Lincoln. Abraham Lincoln