Can an eightball be enough to kill someone? Did she snort the whole damn thing herself? It was her friends who got the coke, I think they should be charged. He merely paid for it just as he probably paid for many things for her.
depends on a lot of factors. condition of heart, any other drugs she was taking, what the coke was cut with- and how many times, how often she had done coke and her tolerance level, how quickly she did it all... and a lot more.
also the "ingesting" makes me wonder. does that mean she snorted, smoked or ate it? that would also make a difference.