49-year-old Tejpal, who joined Delhi Police in 1984, was posted in Kanjhawala police station since June 2011.
He committed suicide at his first floor office after doing an emergency duty this afternoon, police said.
A suicide note was recovered from his pocket in which he held a widow and her son responsible for his act, police said.
A case of abatement to suicide has been registered against the woman and her son, police said, adding that the family members of the victim were informed and probe was on. PNM
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