Wallander

Mise en scene
The location is set in the countryside near the coast, the reason for this location is to show how isolated it is from any main town or busy areas. This adds to the tense scenes to follow knowing that no one is their to help the victim who has been attacked.
Props have also been used by on of the female characters, she is holding a knife which can imply that she's the person responsible for what happened to the man, it also gives her power over both of the other characters as she has been portrayed to be a dangerous individual through the first 20 seconds of the opening sequence. it can also assist in the females representation of being rebellious and going against rules that may apply to her because she believes that those rules should not stop her from doing what she wants to do. Furthermore through the use of make up we are given another reason to believe that she's a dangerous plus rebellious character as she had purple which can show how she goes against things that are socially accepted or trendy, it also makes her stand out more compared to someone who may have blonde or brown hair as she is different compared to typically normal people.
Finally low key lighting has been used in the background of the title sequence to follow the theme of death as black or dark has representations of death. Another reason for using this dark tone would be to assist the mood with what happened to the man, dull lighting sets a depressing or sad mood.

Camerawork
At the start we are shown an establishing shot of the fields, it makes clear to the audience where the opening sequence is set also it shows how there is nothing around the area which makes us wonder why this is.
We are then shown a close up of the knife that the older female character is holding in hand, making us realize that the car behind them was not caused by an accidental car crash but by this specific character. through using the close up it makes us focus on the knife and begin to wonder why she has the knife and why she stabbed the man in the car as it is the main purpose of this frame so we concentrate mainly on this object being held by the character.
Additionally an extreme close of the male driver is shown when the two females are walking away from the crime to portray how badly he has been beaten as you are able to see his cuts and bruises clearer but is also done to show to the audience that he is still alive as you can see him moving and breathing.

Editing. 

There is an eye line match when the male detective is standing next to the car in the crime scene we see him look in the direction of the two females in the police car this has been done so that we are shown how they are responsible for what has happened.  
When both female are shown walking slow motion has been used to prolong the scene which strings out the depressing mood set from the man who has been stabbed fro longer in the opening sequence it also allows for the audience to realize what has happened as the slow motion gives them time to think about what has just happened adding to the reality of it.

Sound.

Non diegetic sound had been used within the silent part of the sequence before the police arrive, there is whistle that can be heard which builds up tension creating an anti climax as nothing happens after the incident. The soundtrack playing throughout the beginning of the opening sequence creates a sad mood to reflect on the critical condition of the victim it helps to make us emphasize for the male as if he was someone in real life or the incident actually did happen, it makes the scene more naturalistic. Lastly there is heavy breathing from the girl walking away holding the knife which can potentially show how she's frightened of what's going to happen as a consequence of her actions, furthermore we can hear a sharp spike once the knife is dropped which can reflect how much pain the weapon could inflict on its victim as it is seen to slice through the shot onto another using a transition which makes us wonder how much pain the victim would have been in, it also makes a sinister atmosphere as we are now aware how dangerous the weapon truly is.