The strange death of the famous surgeon Khokhlov in an accident aroused suspicion among the traffic police, and they turned to detectives. After examining the contents of the gas tank of his motorcycle, Loginov and Petrovskaya found out that the electrolyte added to the oil was the cause of the tragedy, and the surgeon's helmet found nearby was stained with lubricant. Obviously, in this way the killer hoped to reduce the victim's chances of salvation ...

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