Action & Adventure, Psychological Thrillers, Suspense 

This is a paperback edition ot Dirty White Boys by Stephen Hunter about three psychopaths who stage a daring break from a maximum security prison and embark on an unprecedented killing spree that soaks Oklahoma in blood.
They busted out of McAlester State Penitentiary-three escaped convicts going to ground in a world unprepared for anything like them....

Lamar Pye is prince of the Dirty White Boys. With a lion in his soul, he roars-for he is the meanest, deadliest animal on the loose....
Odell is Lamar's cousin, a hulking manchild with unfeeling eyes. He lives for daddy Lamar. Surely he will die for him....
Richard's survival hangs on a sketch: a crude drawing of a lion and a half-naked woman. For this Lamar has let Richard live...

Armed to the teeth, Lamar and his boys have cut a path of terror across the Southwest, and pushed one good cop into a crisis of honor and conscience. Trooper Bud Pewtie should have died once at Lamar's hands. Now they're about to meet again. And this time, only one of them will walk away.... - from Amzon