A 19-year-old boy has been arrested on Wednesday for allegedly abetting suicide of a 14-year-old girl, who had hanged herself at her Howrah home, earlier this month.

Police said the girl had written the passcode of her mobile phone on her wrist that helped the cops gather evidence in the case.

The police said they have arrested Sunny Khan who had been allegedly threatening the girl on social media to continue a relationship with him despite the fact that he was married.

“The victim distanced herself from the accused once she realised he was married. But he threatened to post her photographs on social media. The victim was unable to take the pressure and ended her life,” said a senior officer of Howrah police commissionerate.

The family of the Class VIII student had lodged a complaint against the man who they knew was “disturbing” the victim, the police said.

“We knew that a man whom she had befriended on social media was disturbing her,” the girl’s elder sister had told The Telegraph on July 5.

Based on the family’s complaint, officers of Bally police station had initiated a probe and on conducting the forensic examination of the victim’s phone, found evidence of how she was being blackmailed by Khan.