Please identify this tree
This is a shrub called nandina. The botanical name is nandina domestica.
There are many varieties of this shrub, but this one look like the original species. It can grow 7-8 feet at the most, in a location where it is happy. It tend to be multi-trunked. Here is some more information: http://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=c772