It is unlawful for any person who is a fugitive from justice, or who has been convicted in this state or elsewhere of a crime of violence, or of drug addiction or of habitual drunkenness, or who has been confined to a mental institution, to purchase a pistol in this city, and it is further unlawful for any such person to fail to disclose such information when applying for the purchase of a pistol. (Prior code § 6.22.030.)