police union come almost immediately mosby press conference today response assessment freddie gray case fight back claim officer anything wrong arrest transport mr. gray.fraternal order police lodge ask baltimore state attorney marilyn mosby appoint special prosecutor freddie gray investigation personal connection gray family attorney william h. billy murphy jr. marriage city councilman one officer involve tragic situation leave home morning anticipation someone interact would go home night letter state tragic situation none officer involve responsible death mr. gray ryan request mosby appoint special independent prosecutor deep concern many conflict interest present office conduct investigation case letter state conflict include personal professional relations gray family attorney william murphy lead prosecutor connections members local media letter state base several nationally televise interview reporters likely witness potential litigation regard incident via baltimore sun baltimore police union want independant prosecutor mosby connections freddie gray family