Tree Unknown - not any more!

This flowering tree gets beautiful dark red to maroon leaves through summer and fall. I have no clue what it is. Now that I know what the flowers look like, I'm hoping I will be able to identify it. It is young - at the most a couple of years old - and is about 7-8 ft tall.

Another picture

Update: thanks to the ever resourceful Bee, I was able to identify my tree as the Prunus cerasifera 'Atropurpurea': Pissard Plum. It is popularly known as the Purple-leaved Plum or the Cherry Plum.

Yay! Thank you, Bee!