kungfupanda is absolutely correct.
Personally, I'm not altogether comfortable with sentencing on outcome of a crime rather than intent/criminality of the offender since this can lead to wildly disparate results for what is, essentially, exactly the same behaviour.
To illustrate imagine the following two scenarios:
Driver A is doing 30 mph in a 20 zone. He rounds a bend and is caught in a speed trap. Result: a fine fo £150 and possibly three points on his license.
Driver B is also doing 30 mph in the same 20 zone. He rounds the same bend. This time, however, instead of a speed trap there is a young child in the road who is struck and killed. Result: Driver B finds himself doing a 5 stretch.
Driver A and Driver B have exactly the same level of inent to commit a crime and criminal culpability. The difference between them is, ultimately, one of chance.
Should they, therefore, get a similar sentence, or should they receive the wildly different sentences our current system would impose?