Crime scene: 162 mystery solving puzzles to find out who the murderer is

Chapter 47 Six Characters
A homicide case occurred in S City, and a total of 6 people were involved in the case.They are: witnesses, policemen, judges, murderers, the dead, and bailiffs on duty.The deceased was shot by the murderer and died on the spot.Although the witness first heard an argument between the deceased and the murderer, and then heard gunshots, he did not witness it.By the time he arrived at the scene, the murderer had fled.Later, the case was solved, the murderer was caught and sentenced to death.

The 6 people mentioned above are named Peter, Ivan, Clay, Hogg, Mike, and Wall. They are arranged randomly, not in order of the above positions.

A known:

1. Mike did not know the murderer and the deceased;
2. In court, the judge asked Clay about the circumstances of the case;

3. Wall finally saw Peter die;
4. The police said: "I saw that Ivan was not far from the accident site";
5. Hogg and Wall never met each other.

Infer the names and titles of several people involved in this case.

[Answer] The deceased—Hogg, the bailiff—Wall, the murderer—Peter, the witness—Ivan, the policeman—Clay, the judge—Mike.

(End of this chapter)