Identify the source/definition used for '10 safest cities' and verify whether 7 of those jurisdictions have formal cooperation arrangements with ICE.
Source summary
The U.S. Department of Homeland Security (ICE) says
California jurisdictions have not honored ICE arrest detainers and that 4,561 noncitizens described by ICE as criminal "illegal aliens" were released from county jails since January 20. ICE Acting Director Todd Lyons sent a letter to California Attorney General Rob Bonta urging state cooperation, and ICE reports 33,179 individuals in California custody with active detainers and lists counts of alleged crimes. The release includes named cases where local authorities did not honor detainers; some individuals were later arrested and removed by ICE.