I think that what happens in baltimore is that when one neighbourhood drug crew gets taken down its usually whoevers next on the neighbourhoods drug chain of command that takes over, unless the previous boss is able to carry it on behind bars. Street level dealers become mid level dealers and then i guess a step above that is the distributors and the kingpin.Gangs like the BGF and bloods have had success in converting inmates and smaller neighbourhood gangs to their gang so you have the same neighbourhood mob just under the blood or bgf banner. There are advantages to aligning themselves to the bgf. They have a national presence, there entrenched in the prison system probably have good connections also they are more structured. The disadvantage is that once your in it you can't get out and your constantly obligated to do whatever they ask, like the mexican mafia. Im sure theres a good number of mexican gang members in la that wish they didn't have to pay tribute to them for protection in prison.

As far as organised crime goes baltimore did have a few jewish and italian mobsters in the past and also black kingpins like melvin williams, peanut king and kenneth jackson, the nature and level violence has changed since then that local gangs are more concerned about defending turf and the profits are big enough anyway. Although by definition they are organised crime and probably do engage in money laundering and other crimes when opportunity affords it seems that heroin is the one thing that drives most of their profits.