Additional Sessions Judge Virender Bhat freed south west Delhi resident Sachin, who was a neighbour of the woman, of the charges of gangrape under section 376D and criminal intimidation under section 506 of the IPC.
His accomplice, Naveen, who was also a neighbour, could not be arrested.
"Since the woman has not supported the case of prosecution and there being no other eye witness to the incident, it was found futile to carry on trial of the case any further," the judge said while acquitting Sachin.
"Nothing inculpatory against the accused (Sachin) has come in her testimony. The woman specifically deposed that she took his name under pressure. It is, therefore, beyond any shadow of doubt that he had never committed any sexual assault upon the woman," it said.
According to the prosecution, the woman along with her husband and mother had lodged a complaint at Chhawla Police Station here alleging that Sachin and Naveen (not arrested) had raped her on the afternoon of April 6, 2014 when her husband was at work.
His wife did not disclose anything to him immediately due to the threats she had received from the two men but later told him everything, it added.
Sachin was arrested 10 days later, but Naveen could not be nabbed.
The woman, however, resiled from her statement in court saying that both the men were innocent. She said that she had lodged the complaint under pressure from her husband as he had threatened to divorce her.