S1·E18 Log 112: You Blew It

Reed and Malloy make a routine traffic stop on a motorist. Before the NCIC check is completed, the dispatcher broadcasts a domestic dispute call in the two officers' patrol area; Reed and Malloy take the call and let the motorist go. Bad choice; the lieutenant soon calls the two errant officers in to scold them. Turns out the motorist had warrants out for his arrest on robbery and weapons charges. Malloy and Reed then come up with and carry out an ultimately successful plan to nab the wanted criminal.