*inhale*
All Murder Drones have the Solver. When Cyn turned the Worker Drones in Elliott Manor into Solver Drones, she somehow transferred the Solver into their code, thereby allowing the Solver itself (controlling Cyn's body) to control the Solver Drones. As evidenced with V, J, and N, all of the Solver Drones Cyn created became Murder Drones before being sent out to the exoplanets to do Cyn's bidding.