We know from the OP that the university lecturer "admitted the attempted murder" and about "his insurance agreeing to pay all my costs"
We don't know whether the OP, on his part, agreed to anything, eg that with the insurance company paying all his costs he accepted that the matter was settled as far as he was concerned and that he would make no claim beyond that.
Anyway, the OP's lament is not about additional financial compensation but the fact that the university lecturer was not brought to court and sentenced. If that were the case, even a lawyer could not help him because where there is no accuser, there is no case to be heard and adjudicated by a court.