Maagin murder

About five years ago, a rather peculiar fellow named Sampo moved into the back room of our office. At first, it was hard to get anything out of him, but over the years, he claimed to be a genuine mage! Although he kept a low profile on his business, he was always ready to help those in need with his spells and potions. Our cohabitation on Olavintie went smoothly. However, we hadn't heard from Sampo for a while, and his regular clients were asking us if he had been seen, so one of our Mysteries decided to try Sampo's door. Maybe he was just deeply engrossed in his work? The door was indeed open, but instead of revealing Sampo hard at work, it presented a rather shocking sight. Lifeless Sampo. On the opposite side of the room lay another body, whose identity we did not know. The authorities were called to cover the bodies, and now you, crime scene investigators, get to solve this case. Why did Sampo lose his life, and who is the fellow victim found in the room?