Indianapolis police investigate cop for stalking, rape, battery of his ex-wife (also a cop). The cop suspects there is a GPS tracker on his car, and a friend of his (another cop) confirms it. Ten days later, the cop drives to ex-wife’s house in another car and kills her, himself. The ex-wife’s estate unsuccessfully sues the city and the cop’s friend. Seventh Circuit (over a dissent): The city doesn’t have to pay the friend’s legal bills.