I do think that we need a completely new punishment system in the US that focuses on the the end result of the crime more than the motivation of the crime. I also think that we should have harsher penalties all around on crime. The removal of parole and longer minimal sentences would be a good start. I would break down crimes into 2 groups and 8 catagories:
Misdemeanor D: 3 Months in prison, $1000 fine
Misdemeanor C: 6 months in prison, $2000 fine
Misdemeanor B: 9 months in prison, $4000 fine
Misdemeanor A: 1 year in prison, $8000 fine
Felony D: 5 years in prison, $100,000 fine
Felony C: 15 years in prison, $250,000 fine
Felony B: 25 years in prison, $500,000 fine
Felony A: Life in prison, $1,000,000 fine.
The criminal will serve only the highest level penalty. As for multiple criminal acts in a single crime, 2 misdemeanor Ds make one misdemeanor C, 2 misdemeanor Cs make one Misdemeanor Bs, and so forth and so on. So lets say a person did an criminal act that brings up 3 Misdemeanor Bs, 2 Felony Ds, and a Felony C, the final equation would be 1 Misdemeanor B, 1 Misdemeanor A, and 1 Felony B. Since Felony B is the highest that would be the punishment dished out.
Watching a child get killed without doing anything I would measure as a Felony D crime.