Question

why did aksionov suspet that makar had killed the merchant​

Answer 1

Answer:

Aksionov is suspected because he left the inn before dawn where he and the merchant stayed. And also the officer found a blood stained knife from Aksionov's bag while searching. These were the circumstances that led to Aksionov's imprisonment.

Explanation:

Answer 2

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Mrs. Aksionov had dreamt that her husband’s hair had turned grey on his return from the fair. As Aksionov used to drink occasionally, she suspected that her husband may have killed the merchant in a drunken brawl which also correlates with the dream she had the same morning.