Or if you want to go straight to the source, see item 10b on page 5 of: http://www.justice.gov/sites/default/files/usao-sdny/legacy/...
As far as I can tell, the only reason people are saying he wasn't convicted of murder for hire is because the top-level charge is "conspiracy" or somesuch, with "murder for hire" as one of the specific conspiracy items, and they haven't dug down.