Certified GKH Gardening Expert
Unfortunately, your photo did not come through. I am unable to see the state of the tree.
You can test if it still has life by bending the tip of the branch. If it snaps and is brittle, then keep going down until you find tissue that is not brittle. Cut down to that point, but don't cut into the living tissue.
If there is any life left, this will usually coax it back out a little.
If this is planted outside, and not in container, and brought in- The tree is fully dead, as they are only hardy in zones 9 and 10.
Here is an article that will help you to care for the shrub: