Hidden Secret in Bloomington, MN

There is a serial killer on the lose and he has set his sights on Brenda, the homicide detective's wife. Because Brian was putting in so many long hours on the case, he decided to hire his friend to work on his ranch. Brian doesn't realize that his friend is falling in love with his wife. Is his friend the serial killer, or is it his partner Steve, or possibly one of his other suspects.