Police said the accused, Ayub Khan, reached the girl's residence in Welcome area of north-east Delhi around 6.30 AM and stabbed her to death.
Ayub, who was arrested in July following the molestation complaint and lodged in Tihar Jail, came out of prison yesterday, police said.
"Ayub reached the girl's residence around 6.30 AM and starting stabbing her until she lay unconscious. Her mother, who heard her screams, rushed to save her. He also attacked her mother. After the incident, he fled the spot," said a senior police officer.
