With reference to this post:
Lax Criminal Policy Should Not Always Lower Crime - Democracy 4 - Positech Games
This can be considered a continuation of that conversation.
Both Conservative and Liberal (In American Terms) policies can reduce crime, and this study says that the ideal policy would be a mixture of both as seen here:
Name: Liberal versus conservative public policies on crime: What was the comparative track record during the 1990s?
doi:10.1016/j.jcrimjus.2008.06.010 | Elsevier Enhanced Reader
Or at the DoJ here:
Liberal Versus Conservative Public Policies on Crime: What was the Comparative Track Records During the 1990s? | Office of Justice Programs (ojp.gov)