(at around 8 mins) When Scanlon is questioning William Gerwin, the papers Gerwin had in front are gone. In the previous and next shot, they are there.
When Allison drives up to the district attorney's house, she sees someone put something in the mailbox and put the flag up. When Allison, Davalos, his wife, and Scanlon are talking inside, Davalos says his wife noticed the flag was up, she looked inside and found something. This doesn't make sense as the flag being up means there is mail going out, not that the mail has arrived.