A famous chemist was murdered in his own lab. There was no evidence except for a piece of paper with the names of chemical substances on it. On the day he was murdered, the chemist had only 3 visitors: his wife, Mary, his nephew Nicolas, and his friend Johnathan.

Hint : Try revising the chemical short forms learned in Chemistry and use the image.

A serial killer kidnapped people and made them take 1 of 2 pills: he said, one was harmless, and the other was poisonous. Whichever pill a victim took, the serial killer took the other one. The victim took their pill with water and died. The killer survived.

How did the killer always get the harmless pill?

Mrs. Smith went to the police claiming that her vintage necklace was missing. When the police arrived, they saw no signs of a break-in. Only one window was broken. There was a total mess inside the house and dirty footprints all over the floor.

Who is the thief

George Smith was murdered on Sunday evening. There were 5 other people in his house: Mr. Smith’s wife, his personal cook, a butler, a housemaid, and a gardener. They all told Detective Stevens what they were doing that evening:

• Mrs. Smith was reading a book near a fireplace.
• The cook was making breakfast.
• The butler was giving instructions to workers in the living room.
• The housemaid was washing the dishes.
• The gardener was watering plants in the greenhouse.

A young detective by the name of Smith came across a peculiar murder case. The case involved 5 people who all knew each other. One of them was shot dead with a pistol. Unfortunately, the documents didn’t contain the names of either the victim or the murderer.

Smith carefully studied all the papers and managed to determine the names, thanks to a few important details.

John is an amateur tennis player. The day after the crime occurred, he took part in a tournament, playing against a person who wasn’t connected with the case.

Jack moved to the city a year before the murder happened. He was born and raised on a small island, whose inhabitants are mostly fishermen. So Jack’s main dream in life is to own a fishing schooner.

Steve works as a model and is really fond of himself. So much so that, a few days before the murder, he began posing for Bill, who agreed to paint his full-length portrait.

Bill is a famous portrait painter. He says that he expects to finish Steve’s portrait in a week’s time.

Right after the murder occurred, Alex went to Antarctica as part of an expedition to study marine life. He is still at the South Pole, along with 20 other scientists.

In addition, the detective took note of the following important circumstances:

A week before the crime occurred, the murderer broke his leg.

Steve and Alex became acquainted about 6 months before the murder.

Alex and the killer knew each other since childhood — they grew up in neighboring houses in a big city