Serena refers to Mark Featherstone as an "ADA from Florida". In Florida prosecutors are called Assistant States Attorneys or ASAs.
While looking at the large number of bullet wounds the dead attorney has, Detective Briscoe comments that "The shooter must have emptied his entire clip into him." A clip is a metal strip that is used to load cartridges into a magazine, such as the M-1 rifle used in WII had. The removable device on a pistol such as was used here is called a magazine, which holds the cartridges inside the weapon until it is ready to be loaded into the chamber. A police officer, especially one as experienced as Detective Briscoe, would never call a magazine a clip.
Serena says that Mark Featherstone was murdered in Florida but then says that he was vacationing in North Carolina.