Yup....and the taxpayer will get fleeced while the arresting officer, at worst, enjoys a paid vacation.
ping
That's apparently when things got ugly.
Having some experience with Chicago parking cops I can tell you they would hang a ticket on Jesus' donkey without a second thought.
However I must say that usual procedure for an off duty cop is to hang the band from their duty cap on the rear view mirror to alert other LE types that the car doesn't belong to an ordinary serf. Maybe he forgot to do that.
Another little CPD trick was to toss a handcuffed perp into the back of the paddy wagon and 'forget' to buckle them in. Then they take a nice, long ride to the station house taking lots of corners at high speeds.
They can honestly say "I never laid a hand on him, Sarge!". IIRC someone died from that a few years back.
Chicago...what a town.
L