Guns used to kill cops: Where they come from and how they get in the hands of criminals
…Until now, no one has conducted a comprehensive study of how the killers got their guns.
To trace these guns, The Washington Post did a year-long investigation, including building a database of every police officer shot to death in the past decade. (More than 1,900 officers were wounded by firearms during the same period.) Through documents and interviews, The Post was able to track how the suspects obtained their weapons in 341 of the deaths.