Vertical coffin

Swat teams refer to doorways as "vertical coffins" because they are most vulnerable when passing through them. The new Shane Scully novel starts with a bang as an L.A. sherrifs deputy is gunned down on the front porch of a house while serving a routine warrant. The arrest is given to the Sherriff's Department by the Bureau of Alcohol, Tobacco, and Firearms, who neglects to mention the man is suspe...