Medals in the attic

Annie has been working through boxes in her grandmother's attic. With the community auction coming up soon she is searching for the right items to donate. During her search she comes upon a box of medals, one obviously a Purple Heart, the other she is not sure. What's weird is her grandfather's medals are already on display downstairs. So...who do these belong to and why are they in her grandmother's attic?

It's been a while since I've read more of this series and what a perfect way to return to it. Without realizing it...I ended up with a military style cozy mystery