Upon the conviction of any person of violating PMC 9.50.010 through 9.50.040, the Chief of Police shall confiscate the firearm or other weapon or unlawful instrument carried, worn, concealed, drawn, exhibited, used, or attempted to be used, fired, set off or discharged in violation of those sections, and shall dispose of them in the manner provided for the disposal of unclaimed property, unless such disposal is contrary to law. [Code 1970 § 9.24.050; Code 1954 § 10-5.84.]