Detective Riddles Case 6-10

It seems like this site's readers love detective riddles category, maybe because the puzzles here can be categorized as very hard ones. In other riddle sites, you've probably known this category as murder riddles or murder mystery. But since our Detective Thompson not limited himself only with homicide, we prefer to call it detective riddles.

So, these are case 6-10 that Detective Thompson needs to solve. Can you beat him to it?



Detective Riddle Case 006: Caught in the Lie

Old Mr. Bob was found dead in his study by young Trevor. Trevor recounted his dismal discovery to Detective Thompson, who happens to be around the scene.

"I was walking by Mr. Bob's house when I thought I would just pop in for a visit. I noticed his study light was on and I decided to peek in from the outside to see if he was in there. There was frost on the window, so I had to wipe it away to see inside. That is when I saw his body. So I kicked in the front door to confirm my suspicions of foul play. I called the police immediately afterward."

With clue from Detective Thompson, the police officer immediately arrested Trevor for the murder of Mr. Bob. How did he know Trevor was lying?

Answer:

Frost forms on the inside of the window, not the outside. So Trevor could not have wiped it off to discover Mr. Bob's body.

Detective Riddle Case 007: The Lying Secretary

Mr. Lambert was murdered. The police were having trouble to search clues from the crime scene, so they contacted Detective Thompson. The police inspector have interrogated Amy, Mr. Lambert's faithful secretary. From the crime scene investigation and Amy's interview result, the inspector gave these facts to Detective Thompson:

1. Mr. Lambert has been murdered. The murderer buried a stiletto through the back of the chair and right through his heart. It seems like he experienced instant death, showed by his body position that still stiffed on the chair.
2. All the place was a mess, but nothing seems to be lost. Some sheets on his desk had coffee stains, but Mr. Lambert was not a coffee drinker. There was no coffee container of any kind in the office. There were a couple of gloves in the floor.
3. Amy had in her visit book just three announcements: Hari Colton (2:35), Louis Williams (3:10) and Joseph Markis (3:45). Amy says that Joseph was the only one to serve himself a cup of coffee in a paper cup.
4. The cup of coffee was found in Amy's wastebasket. She claims that Joseph entered Mr. Lambert's office with the cup in his hands, and then he left it in her desk, so she took it and threw it away.
5. The stiletto had no fingerprints at all, but the paper cup was all covered with one type of fingerprint: Joseph's (they had a mobile fingerprint lab).
6. Mr. Lambert's wristwatch was broken, probably due to the fight, and it showed the time at 3:50.

Detective Thompson then talked to Amy, to tell her she was under arrest.
Why did he suspect her?

Answer:

1. The watch could not have been broken during a fight. It was clear that there was not a fight because Mr. Lambert was stabbed in the back through his chair. So, the time was a setup.
2. The mess and the coffee was a setup, because there was no fight and it would be a little difficult for Joseph to enter and put on some gloves to fight with a cup of coffee in his hands
3. The undeniable proof is that the cup of coffee only had one type of fingerprints. If Amy touched the cup (which she says she did), there should be some fingerprints of hers on it, unless she was wearing some gloves.

Detective Riddle Case 008: Psychopath

A woman killed her own sister. During the interrogation, she told a story that she just attended her own mother's funeral few days before the crime took place. While at the funeral, she said that she met this guy whom she did not know. She thought this guy was amazing, so much her dream guy she believed him to be just that! She fell in love with him right there, but never asked for his number and could not find him. A few days later, she killed her sister.

Although this woman has confessed to the crime, police are still intriguing by the story, especially because she won't tell them her motive. Hearing this tragic story, with his psychological education background, Detective Thompson easily guessed the woman's motive.

Why the woman killed her own sister?

Answer:

She was hoping that the guy would appear at the funeral again.

Detective Riddle Case 009: Numeric Code

A police investigator went deep cover to crack an international smuggling ring. Just when his work came to an end, he has suddenly gone missing. While inspecting his last-known location, his partner found a note:
The investigator already reported before he's missing that there are currently 3 persons that suspected as the smuggling's leader: Bill, John, and Todd. Once again, police has found difficulty and asked help from Detective Thompson to decipher the code.

Thompson shook his head, can't believe that police were unable to solve this simple puzzle. What the code says?

Answer:

Bill. If you read the message upside down, you'll notice that the numbers resemble letters and that those letters form legible sentences. The message is "Bill is boss. He sells oil."

Detective Riddle Case 010: Grand Theft Auto

A car thief, who had managed to evade the authorities in the past, unknowingly took the automobile that belonged to Detective Thompson. The sleuth wasted no time and spared no effort in discovering and carefully examining the available clues. He was able to identify four suspects with certainty that one of them was the culprit.

The four make the statements below. From twelve of total statements, six are true and six false.

Suspect A:
1. C and I have met many times before today.
2. B is guilty.
3. The car thief did not know it was the Detective's car.

Suspect B:
1. D did not do it.
2. D's third statement is false.
3. I am innocent.

Suspect C:
1. I have never met A before today.
2. B is not guilty.
3. D knows how to drive.

Suspect D:
1. B's first statement is false.
2. I do not know how to drive.
3. A did it.

Which one is the car thief?

Answer:

Consider that six statements are false. A's first statement and C's first statement contradict each other. One of them is false. C's and D's contradict each other. One of them is false. Therefore, there are four additional false statements.

Assume A is guilty. If so, A's second statement, B's second statement, and D's first statement are the additional false statements.

Assume D is guilty. If so, A's second statement, B's first statement, and D's third statement are false. This also only makes five false statements. D did not do it.

Assume C did it. If so, A's second statement, D's first and third statements are false. This again, makes only five false statements.

After ruling out suspects A, C and D, B is the culprit. B's third statement, C's second statement, and D's first and third statements are the additional false statements. This adds up to six.

Challenging enough? Well, those aren't the most difficult cases that Detective Thompson had to solve. Wait until he come back with much more hard detective riddles and murder puzzles!

Difficulty:

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