Reduced jail time?

A woman is killed by a driver.  The crash occurs midday.  There were reports of the driver swerving all ove the place.  The driver crashes into a phone poll and a pedestrian goes to render aid.  The belligerent driver then backs up, goes into drive and runs her over-killing the Good Samaritan.  
Today we find out the woman (this occurred at midday) was taking ambien.  There is now a debate whether or not the 4 year potential sentence should be reduced.  What are your thoughts?

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