Violent acts are Infrequent compared to other crime shows but it is very graphic and bloody when violence does occur onscreen.
A few unexpected/abrupt killings that take the viewer by surprise
Many characters get shot, stabbed, beaten, tortured or executed throughout the series. The violence is quite graphic when it is onscreen accompanied by blood spray/blood pools and gore detail.
Series gets progressively more violent with each season with more on-screen deaths, blood and gore detail.
Scenes of characters getting strangled and heads being held under water.
Child abuse and children witnessing crimes.
Spousal abuse in season 4.
Reckless driving and automobile crashes.
There are a lot of threats. For instance, people are told that their families will be harmed if they do not cooperate.