Other mistake: When Voight finishes talking with Rev, Voight walks away. When he does, he goes in the opposite direction from where his car is parked and on the wrong side of car for a driver. (00:27:05)
The Song of Gregory Williams Yates - S3-E13
Other mistake: Lindsay is video calling on Nellie's mom's phone to Yates. Bought at the scene of a fire, tells Finn to text Lindsay and let her know about the fire. We see the text come in, but it's on Nellie's mom's phone, not Erin's. (00:31:00)
Continuity mistake: Opening sequence, they are called to Kinzie and Dearborn. They instead show up at Franklin and Erie. After a short run down an alley, they call in their location as 3233 S. Princeton (more than three miles south of where they were, and nowhere near the Loop). (00:01:34 - 00:02:50)
A Night Owl - S3-E14
Continuity mistake: When the woman came into the precinct and showed Erin and Voight her daughter was taken on her phone, she dropped her hand after Erin took it. The very next shot from the reverse still shows her holding the phone as does Erin.
Answer: Because he is a great cop and gets the job done better than anyone.