I think he picks up the warrants from the police stations or get the bail jumpers list. If someone defaults on bail, then they are free game so to speak. In some states anyone can pick up warrants and serve them. I do find it amusing that he cannot carry lethal weapons. Idiot should just take the BLE and become a cop. He may end up on the wrong end of a gun one day. I totally disagree with his approach or any attempt at vigilantism.
This might interest you:
In the United States of America, bounty hunters have varying levels of authority in their duties with regard to their targets depending on which states they operate in. As opined in Taylor v. Taintor, and barring restrictions applicable state by state, a bounty hunter can enter the fugitive's private property without a warrant in order to execute a re-arrest. In some states, bounty hunters do not undergo any formal training, and are generally unlicensed, only requiring sanction from a bail bondsman to operate. In other states, however, they are held to varying standards of training and licensure. In California, bounty hunters must undergo a background check and complete various courses that satisfy the penal code 1299 requirements.[2] In most states they are prohibited from carrying firearms without proper permits. Louisiana requires bounty hunters to wear clothing identifying them as such.[3] In Kentucky, bounty hunting is generally not allowed because the state does not have a system of bail bondsmen, and releases bailed suspects through the state's Pretrial Services division of the courts, thus there is no bondsman with the right to apprehend the fugitive. Generally, only fugitives who have fled bail on federal charges from another state where bounty hunting is legal are allowed to be hunted in Kentucky.[3] In Texas, every bounty hunter is required to be a peace officer, Level III (armed) security officer, or a private investigator.[4]
State legal requirements are often imposed on out-of-state bounty hunters, meaning a suspect could temporarily escape re-arrest by entering a state in which the bail agent has limited or no jurisdiction.