[Symmetry]

Massachusetts doesn't have private prisons, so I doubt that's the problem here. It's more that putting people behind bars is politically good for prosecutor with ambitions. Martha Coakly was almost elected Senator despite or maybe because of her role in a literal witch hunt.

http://en.wikipedia.org/wiki/Fells_Acres_Day_Care_Center_pre...

[rdtsc]

It could also be purely ideological or psychological. It might give her a kick to have that power or she thinks if police suspects someone they are probably already guilty and deserve to be locked away and punished.

It would be an interesting study to see if she had access to pictures, gender, race, income, age of those whose results she forged.