Puzzle: The Root of the Problem

Mr. Finkel was an avid (殷切的，有着强烈爱好的) gardener who was very proud of his landscaping (景观美化) and horticultural (园艺的) skills. Unfortunately, Mr. Finkel’s hobby caused the death of a neighbor after he planted a tree in his backyard (后院,). How could his gentle pastime (消遣，娱乐) have turned deadly?
Clues:
Q: Did the tree obstruct (阻隔) or hinder anyone’s view?
A: No.
Q: If Mr. Finkel had planted the same tree in a different spot in his yard, would the outcome have been the same?
A: No.
Q: If Mr. Finke; had planted the tree a day later or a day earlier, would he have been responsible for his neighbor’s death?
A: No.