Manoj Kumar (48) attached to Mattanur station in the district has been suspended after a preliminary probe, they said.
A detailed inquiry into the spat between Ashish P Raj, son of CPI-M Kannur district secretary P Jayarajan and the police officer,is going on, the police added.
Raj, who was returning from Bengaluru by bus with a group of girls, which included his cousin, reached Mattanur in the morning of January 10.
The group was returning after a dance competition in Bhopal.
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In his complaint, Raj said the police officer abused them, saying it was not a public toilet.
However, the officer and other police personnel refuted his allegation.
Raj had demanded in an authoritarian manner that they wanted to use the facility, they said.
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