A Medical Lake man ended up in jail after he allegedly threatened a man he bought a puppy from at knifepoint. Nicholas R. Tilson, 32, faces a robbery charge for demanding a $200 refund from the puppy’s prior owner after the parties agreed to the sale on Feb. 11. According to court documents, the victim’s wife arranged the sale of the puppy, but later asked her husband to refund the $200 down payment and collect blankets, a crate and other supplies that were included in the purchase from Tilson’s home. The victim told police Tilson did not return all the puppy supplies to him, so he told Tilson he could not refund the payment until he had all the supplies. Tilson allegedly pulled out a knife, held it to the victim’s stomach and backed him up against a vehicle. Fearing for his safety, the victim agreed to refund $100. When interviewed by police, Tilson initially denied being home, but eventually admitted to threatening the victim over the puppy sale. The puppy’s whereabouts were not mentioned in court documents.