In the execution of the duties of any police officer in arresting any person accused or suspected of crime, or any suppression of any riot or unlawful assembly, or in the prevention of any offense against the city or state, said officer shall have the power, when necessary, to require the aid of any citizen, and it shall be unlawful for any person to refuse or willfully neglect to obey the summons of any police officer in such cases.
(Prior Code, § 33.03) Penalty, see § 10.99