As a general rule, the owner of tree is responsible for any damage caused by that tree to neighboring property owners, whether that is is caused by falling branches that damage structures above ground, or roots that cause damage below ground, such as blocking side sewer lines. There is no criminal law imposing that responsibility, however. If a neighbor's property has been damaged by a tree, or is under threat of damage, is up to that neighbor to enforce his rights in a civil lawsuit.
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