The death of Kathryn Steinle, who was fatally shot on July 1 while strolling on San Francisco's Embarcadero, was a tragedy. And when the suspect was revealed to be a Mexican national with a criminal record who had been deported several times, it became a flash point in the long-divisive political debate about how to reform the nation's immigration system.
Now Steinle's parents are pushing for changes, and the House of Representatives has passed legislation that would restrict federal funds for cities such as San Francisco that refuse to comply with federal immigration laws.
Here's a look at the situation.