You made quite a few kills with it. Can you prove you picked it up? Otherwise I can't verify if you spawned it yourself or if he spawned it.
Seeing the first report, where the cheat did not make any kills at all, it seems a bit like he carried you (assuming you did pick it up, but can't verify that). Combined with the amount of kills, I don't think it was a mistake.
Both scenario's I personally consider cheating. If you spawned it yourself definitely is. But "using" someone else his cheat by letting him spawn things for you, gives you the same advantage as he has. Only you did not download anything yourself.