Ten police officers worked on the case, he said, tracking the Craigslist posting to a west-end apartment."Police knocked at the door and asked if there was a baby in the apartment," Const. Fanning told reporters at a news conference.He said the 23-year-old mother was found nursing a seven-day-old baby.[..]The couple were initially arrested for questioning about the ad."They said it was just a hoax," Const. Fanning explained.The father, who placed the ad using a computer found in the apartment, was taken to jail.Police sent a report to Crown recommending a charge of public mischief, but the Crown didn't feel there was enough evidence to support the charge, he added.The baby was taken from the couple by a social worker and placed in care, Const. Fanning said.