Carrying various kinds of boomerangs, Captain Boomerang is able to infiltrate and destroy with expert precision. After Task Force X disbanded, Captain Boomerang got out of jail early and hooked up with a few of The Flash's other major villains: Mirror Master, Captain Cold and The Trickster. Together they all tried to take Flash down one final time, but failed utterly when Batman and Orion teamed with the Flash to take them down.
GCD :: Cover :: The Flash #148
Digger please: Australian George "Digger" Harkness has been using boomerangs as a weapon since losing his job as a toy mascot. After years of affiliation with Flash's Rogues, he wound up with the Suicide Squad, a black ops squad dirtier than the cinema's "Dozen," where he risked worse than the punishment shackle by mocking the rules (and ruler Amanda Waller).