John,owner of a most exclusive nightclub was shot and killed ba a gang,after considerable effort on the part of the police,five men were arrested as suspects and were asked to say for themselves what they know of d case. Each man made three statements,two of the statements are true and one of d statements is false. Lefty man: statement 1- i did not kill John. Statement 2- i never owned a gun. Satement 3- Spaco did it. Red man: statement 1- i did not kill john. Statement 2- i never owned a gun. Statement 3- d other guys are all passing d back. Don man: statement 1- i am innocent. Statement 2- i never saw boss before. Staement 3- Spaco is innocent. Spaco man: statement 1- i am innocent. Statement 2- boss is the guilty man. Statement 3- lefty man lied wen he said i did it. Boss man: statement 1- i did not kill john. Staement 2- red is d guilty man. Statement 3- don and i are old friends. Therefore,who killed John amoung these men

To determine who killed John, we need to analyze the statements made by each suspect. Remember, each suspect made two true statements and one false statement. Let's break down each suspect's statements:

1. Lefty man:
- Statement 1: "I did not kill John." - Could be true or false.
- Statement 2: "I never owned a gun." - Could be true or false.
- Statement 3: "Spaco did it." - Could be true or false.

2. Red man:
- Statement 1: "I did not kill John." - Could be true or false.
- Statement 2: "I never owned a gun." - Could be true or false.
- Statement 3: "The other guys are all passing the blame." - Could be true or false.

3. Don man:
- Statement 1: "I am innocent." - Could be true or false.
- Statement 2: "I never saw the boss before." - Could be true or false.
- Statement 3: "Spaco is innocent." - Could be true or false.

4. Spaco man:
- Statement 1: "I am innocent." - Could be true or false.
- Statement 2: "The boss is the guilty man." - Could be true or false.
- Statement 3: "Lefty man lied when he said I did it." - Could be true or false.

5. Boss man:
- Statement 1: "I did not kill John." - Could be true or false.
- Statement 2: "Red is the guilty man." - Could be true or false.
- Statement 3: "Don and I are old friends." - Could be true or false.

Based on these statements, we need to find any contradictions between the suspects' statements. Let's analyze them:

- Lefty man accused Spaco of committing the crime (Statement 3), but we don't have any information about its truthfulness.
- Red man claimed that the other guys are all passing the blame (Statement 3), but we don't have any information about its truthfulness.
- Don man stated that Spaco is innocent (Statement 3), but we don't have any information about its truthfulness.
- Spaco man pointed out that Lefty man lied when he said he did it (Statement 3), but we don't have any information about its truthfulness.
- Boss man accused Red of being the guilty man (Statement 2), but we don't have any information about its truthfulness.

Since we lack conclusive evidence provided by the suspects' statements, we cannot definitively identify who killed John among these men. Further investigation or evidence is needed to reach a conclusion.