A rather foolish car thief unknowingly stole the car of the chief of police. The police immediately launched an investigation, and based on witness statements, four suspects were arrested who had been seen near the car at the time of the crime.

Because the chief of police took the case very seriously, he decided to personally examine the suspects and use the new lie detector from the police station. Each suspect gave three statements during the examinations, which are listed below:

Suspect A:

1. "In high school, I was in the same class as Suspect C."
2. "Suspect B does not have a driver's license."
3. "The thief didn't know that it was the car of the chief of police."

Suspect B:

1. "Suspect C is the guilty one."
2. "Suspect A is not guilty."
3. "I have never sat behind the wheel of a car."

Suspect C:

1. "I never met Suspect A until today."
2. "Suspect B is innocent."
3. "Suspect D is the guilty one."

Suspect D:

1. "Suspect C is innocent."
2. "I didn't do it."
3. "Suspect A is the guilty one."

With so many contradicting statements, the chief of police lost track. To make matters worse, it turned out that the lie detector did not work as it should, because the machine only reported that exactly four of the twelve statements were true, but not which ones.

The question: Who is the car thief?

The solution: Click here!

Another question: Just a week after the previous theft, which had so deeply affected the chief commissioner, another shocking incident occurred. This time, an antique vase from the municipal museum had mysteriously disappeared. The police acted quickly and arrested six suspects.

Determined to uncover the truth, the chief commissioner decided to use the lie detector again, despite the protest of the technician who was still busy with the repairs.

The suspects were not very talkative and each made only three statements.

Suspect A:

• "Suspect B is innocent."
• "Suspect D is innocent."
• "Suspect E is innocent."

Suspect B:

• "Suspect A is innocent."
• "Suspect C is innocent."
• "Suspect E is innocent."

Suspect C:

• "Suspect B is innocent."
• "Suspect F is innocent."
• "Suspect E is innocent."

Suspect D:

• "Suspect A is innocent."
• "Suspect F is innocent."
• "Suspect C is innocent."

Suspect E:

• "Suspect C is innocent."
• "Suspect D is innocent."
• "Suspect F is innocent."

Suspect F:

• "Suspect C is innocent."
• "Suspect D is innocent."
• "Suspect A is innocent."

As the technician had feared, the lie detector still did not work properly. The device now just indicated that four of the suspects told exactly one lie, and that all other statements were true.

Who is the culprit?

Another solution: Click here!