Another "at the time of death" fact, is that just a day or 2 before his death, Pac had retrieved papers from LA to run for Mayor.
The reason that Tupac attacked Biggie for "biting his style", is because prior to going to prison, Tupac had pretty much finished all of Me Against the World, using beats that his producer had made. However, upon being imprisoned, Pac's producer gave Biggie all the beats instead, despite Pac having paid for them.