what's the maximum sentence for manslaughter? presumably it'll be x 6 - with a bit of luck he'll die inside. Slowly and painfully.
In England and Wales manslaughter has a "discretionary" life sentence, as opposed to the mandatory one for murder. This means the judge's discretion is used. He could impose any sentence at all, from an unconditional discharge, which means a conviction is recorded but no punishment given, right up to life imprisonment, or even a fine. Fines for manslaughter are normal where the defendant is a company rather than an individual (although it is usually easier to prosecute in such cases as a health and safety breach, as the punishment is the same and the conviction easier to obtain). An individual can expect a sentence of a few years.
The point of manslaughter compared to murder is that murder is an intentional act with an element of forward planning. Manslaughter is not and can be simply an act of negligence.