The description about absolute privilege is not quite correct. Complaints made to police are only protect by absolute privilege once an information is sworn or a charge is laid - see Caron v. A., 2015 BCCA 47
In law, (1) the duty a lawyer has to keep their client’s information confidential, including communications between the lawyer and client and advice given to the client, or (2) the client's right to have their confidential communications kept secret and protected from disclosure. See "lawyer."