THE WATCHDOGS: It’s been nearly three years since the Chicago Police Department seized a small arsenal of weapons — including four assault rifles — from the River North mansion of James B. Finkl, a steel company heir who owned a security business with two Chicago cops. Finkl wasn’t charged. The case remained in limbo. Now, City Hall is ordering a police internal affairs investigation to look into what happened to the case against Finkl, who was in business with police Lt. Daniel J. Shields.