Killing a policeman in front of his mother is a kind of resistance to his mother's discipline
The police are the representatives of the superego, that is, they symbolize a person's mind, moral restraint, self-control and sense of justice.
Walls also represent constraints. Do you feel that you are not free enough and are always bound by your family?
There is blood at the door, which means emotional venting and injury and loss of energy.
As for this head, the head represents thought, and sometimes you want to rebel against your superego.
Later, another policeman, on behalf of you, was calm and did not dare to resist life.
The body floats in the lake not far from home, indicating the subconscious.
That is to say, subconsciously, I feel uneasy because there is a potential conflict and guilt.
From the usual dissatisfaction with their own environment.