The Center for Immigration Studies has used information provided to the office Senator Chuck Grassley (R., Iowa) to map out the locations of where convicted killers were let go by Immigration and Customs Enforcement officials in 2013. The killers were booked out in 24 states and were associated with 96 different cities, according to the CIS report. The following map shows with red dots the ZIP codes where they were released and with blue squares the ICE centers where they were booked out:

The state where the greatest number of illegal immigrants with homicide-related convictions were reportedly released was California. CIS says the city or town with the greatest concentration of convicted-killer illegal immigrants was Miami, followed by Los Angeles and the Bronx. See the full, interactive map here.