The special upper sessions court judge A K Singh found police constable Mohan Singh Sengar, along with other accused Vikas, Vijay, Kamal and Shankar, guilty of abetting the suicide of Gopal Yadav (28) under section 306 of Indian Penal Code (IPC).
The court also imposed a fine of Rs 25,000 on each of the convicts.
Nine witnesses were presented before the court by the prosecution during the trial.
"The accused used to peep into the house of Yadav through his roof in his absence and would get into altercation with him if he objected to this," said public prosecutor Jyoti Tomar.
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The trigger came when Yadav approached Palasiya police stations against Sengar and others to file a report on March 8, 2012, but was apparently turned away by police.
Tomar said that when the accused came to know about this they threatened Yadav with dire consequences.
"Depressed over the developments, Yadav hanged himself from the roof of his house with a rope the next day," the public prosecutor said.