In lack of better things to do (I should get a life I guess...), I managed to identify three of the guys in the lineup.
2nd from left is Benny "Bugsy" Siegel, 6th from left is Louis Kravitz (a narcotics peddler) and 8th from left is James Feraco (a later member of the Mangano Family, murdered in 1940 or 1941.)
However, this gang doesn´t seem to be what we know today as "Murder Inc". The picture seems to have been taken in or around mid 1920´s. Note how young Siegel looks. "Murder Inc" was active in the 1930´s and if I´m not mistaken, Siegel was never arrested with members of the "Murder Inc" gang. I think that this is actually members of the "Meyer and Bug" gang, headed by Meyer Lansky and Benny Siegel.
I could be wrong though....