Three police officers were killed in Baton Rouge, nearly a week after seven were killed in Dallas.

Here is what we know so far about the shooter in Baton Rouge, named Gavin Long, based on preliminary reports:

1. He was a black man celebrating his 29th birthday in Baton Rouge, a city that has experienced much tension between its people and its police force.

2. Gavin was awarded placement on the Dean’s List for his excellent grades as a university student.

3. Gavin was a Marine who achieved the rank of sergeant, deployed to Iraq.

4. He uploaded multiple youtube videos, at least one of which explained his views on police brutality.

Below is one of his videos, still circulating as of the time of this report but expected to be taken down soon.