Around 9:00 p.m. on June 29, a police sergeant was bicycling through the park blocks when he noticed a subject smoking marijuana. The suspect, when contacted by the sergeant provided a name that officers later learned was false. The subject was arrested for violation of City of Eugene park rules (possession of less than an ounce of marijuana) and placed in the county jail. Jail personnel learned his true identity and found that warrants had been issued for his arrest for Possession of Less than an Ounce of Marijuana, and Delivery of Marijuana within 1000 Feet of a School. The subject was also in possession of a syringe and exhibited symptoms of recent heroin use.