Edgar Lustgarten is joined by a ballistic expert for this instalment of Scotland Yard.
It begins with someone doing some poaching and is caught by the gamekeeper. They also discover a dead body.
Both of them were not responsible. The bullet that killed Davy Charlesworth came from a .22 rifle.
Charlesworth was engaged to marry widow Emilie Thatcher who lives in a farm with her daughter Julie and her brother. None of them have a .22 rifle as well.
Although the Scotland Yard detective suspect a man must have killed Charlesworth. They think again when they find out that Julie is a crackshot at the funfair. She was also having an affair with the much older Charlesworth.
I am not sure if Lustgarten actually needed the expert with him. He could had done the explanation himself.
It is another well constructed story, efficiently done with both mother and daughter as likely suspects.