[1] The National Security Department is led by a Deputy Commissioner of Police, who is appointed by the Chief Executive of Hong Kong.

[12] Senior police of the department has been sanctioned by the United States, including Edwina Lau, Frederic Choi, for their role in enforcing the NSL.

[13][14] According to local newspaper Ming Pao, police from the NSD regularly, sometimes monthly, met the activists to learn of their latest activities.

[16] An officer, Fung Siu-man, told the court that only national security police had access to a Facebook account under the fake name of "Tang Kee."

The Hong Kong police issued a statement condemning acts of impersonation and asked for more information from those involved in order to follow up on the incident.