Earlier this month 32-year-old Kathryn Steinle was fatally shot on Pier 14 in San Francisco, the bullet allegedly fired by an immigrant with a criminal record and without legal status.

Juan Francisco Lopez Sanchez, had multiple felony convictions and had been deported five times. 

But San Francisco authorities released him, rejecting a request from federal immigration authorities to hold him until they could take him into custody.

For a look at how this tragedy might sway the debate over immigration, we turn to Lewis De Sipio, professor of political science University of California Irvine.

Click on the blue player to listen to the interview.