Yep, it looks exactly like our mulberry trees. Depending on which type of mulberry it is, the fruit could range from "insipid" to downright tasty, but it will be safe to eat and pretty easy to harvest, regardless (an easy way to harvest is to put a sheet under the tree, and shake it). You might want to wait until the fruit ripens (which should be pretty soon now), and see if you like them before you decide whether or not to cut it down. We planted several mulberry trees on purpose, and I really like the pies we make from the fruit. It's especially good if you mix them with something excessively tart, like sour cherries, to moderate the tartness without having to pile in tons and tons of sugar.