It strikes me that a case like this demands further investigation. It doesn't sound like a racist killing, as such. But it could be a murder of some sort.
At the least, someone should look into his gambling debts or finances to see if there were possible motives for suicide. I suppose the crime scene probably has been disturbed by now, and any clues pretty well gone, but it should still be gone over with a fine tooth comb. Ditto his clothing, etc.
"At the least, someone should look into his gambling debts or finances to see if there were possible motives for suicide."
Gambling was my first thought.
You beat me to the post!
Maybe he went to his old high school because it gave him memories of better days in his life.