It is a Brazilian Pepper Tree. They get the fruit in the winter and look very Christmas-y. The problem is, they are a pest tree. The wood is very brittle and they spread like wildfire. Once you get one, it is almost impossible to kill. Every branch that breaks sends out a bunch more. We have one behind our house in an easement area. After the hurricanes, new ones popped up EVERYWHERE. They choke our native plants and are spread even more by birds eating the berries (humans should NOT eat the berries, I understand they are poisonous. Very pretty, but a pure pest.

looks like Nandina