There have been previous refusals to extradite to the US
going back a few years a court refused to extradite a sex offender because the states potential punishment was considered a breach of human rights.
It's also worth noting the UK can't extradite if the death penalty is an option. Not something the US likes but every so often Canada forces them to take it off the table, or they won't extradite.
For a beacon of the civilised world, the US can be very insecure at times.
Biting the hand that feeds IT
