A transient accused of stealing an English bulldog puppy at gunpoint pleaded not guilty Friday to several charges.Jajuane D. Etheridge, 23, was arraigned on charges of first-degree unlawful possession of a firearm, second-degree unlawful possession of a firearm and second-degree possession of stolen property.Trial was set for Dec. 17.Etheridge allegedly stole the puppy, which is valued at $2,000, after arranging over Craigslist to purchase two dogs on Oct. 19 from an Oregon couple, Jim and Pat Steele. He said he’d pay $4,000. Instead, Etheridge met the couple in the parking lot of Clackamas Town Center and allegedly displayed a gun and made off with one dog, Harpo, a 9-pound pup who is about 10 weeks old, according to court documents.Etheridge was charged here because police found Harpo the dog in a suitcase in Vancouver, following a three-hour SWAT standoff Oct. 21 on Plomondon Street. Investigators said Etheridge allegedly stole the dog to give to his ex-girlfriend’s daughter. Harpo, found by police who had noticed a suitcase moving a bit, was unharmed.Police were tipped off to the dog’s location after Etheridge’s ex-girlfriend saw a news story on the bulldog robbery, Vancouver police Officer James Watson wrote in a probable cause affidavit filed with the court.