He wasn't charged with that, although all reports indicate he did do it. All sorts of conspiracy theories as to why he wasn't charged, most likely boils down to LE or prosecutorial incompetence.
It was, in fact, pay of the allegations of the crimes he was charged with, and it explicitly was a sentencing factor. He wasn't charged with, say, attempted murder or conspiracy to commit murder for the alleged murder-for-hire scheme, though.