The USA is overly sympathetic on crime and illegal immigration.
Example: The US Supreme Court said that an illegal immigrant cannot be detained indefintely if their country of origin refuses to take them back.
The following countries will not cooperate with US deportation laws for citizen's found guilty of committing a serious crime.
Afghanistan, Algeria, Burundi, Cape Verde, China, Cuba, Eritrea, Gambia, Ghana, Guinea, India, Iran, Iraq, Ivory Coast, Liberia, Libya, Mali, Mauritania, Morocco, Sierra Leone, Somalia, South Sudan, and Zimbabwe.
Result: The murder of Connecticut resident Casey Chadwick.
The illegal immigrant who was convicted in the June 2015 killing of Chadwick was a Haitian national named Jean Jacques. Jacques, 41, had a previous attempted murder conviction and should have been deported, but Haiti would not take him back.
Source:
http://dailysignal.com/2016/04/28/in-2015-19000-criminal-illegal-immigrants-were-released-from-custody/19,000 criminals who are illegal immigrants are released from prison back into US society every year to commit further crimes.
That is the most disgraceful result directly attributable to government policy imaginable.