At about 10 minutes: when Valerie Walsh steps out of her car her legs are bare. In the next shot, inside her house, she is wearing stockings.
Although set in 1989, yet When Mr. Walsh goes to open the trunk of his car to take out the tire wrench the license plate reads 1983.
At approximately 15 minutes and 43 seconds in, a boom mic is clearly visible at the top of the screen.