He worked in a bar and was arrested for taking drugs. How do you know which public security bureau he arrested?

If a person suspected of taking drugs is punished by public security administration, the public security department under administrative detention shall notify the family members of the punished person according to law.

Legal basis:

Article 72 of the Law on Public Security Administration Punishment commits one of the following acts, and shall be detained for more than 18 days and less than 15 days, and may be fined less than 2,000 yuan; If the circumstances are minor, they shall be detained for less than 5 days or fined for less than 500 yuan:

(a) illegal possession of opium less than 200 grams, heroin or methamphetamine less than 10 grams or other small amounts of drugs;

(2) Providing drugs to others;

(3) taking or injecting drugs;

(4) coercing or deceiving medical personnel to prescribe narcotic drugs and psychotropic drugs.

Article 97 The public security organ shall announce the written decision on administrative penalties for public security to the punished person and deliver it to the punished person on the spot. If it cannot be announced to the punished person on the spot, it shall be served on the punished person within 2 days. If it is decided to give administrative detention, it shall promptly notify the family members of the punished person.