The accused, Shyambahadur Yadav, hailing from Uttar Pradesh, was arrested after he confessed to killing the victim Ghanshyam Vishwakarma (41) along with his friend and accomplice Pramod Sharma.
According to the police, the body of Vishwakarma, a carpenter by profession, was found on Thursday.
Vishwakarma had left home after he received a phone call at about 7.30 pm on September 16. After he failed to return home for three days, a missing person complaint was registered at Samata Nagar police station on September 19.
The next day, his body was found and a post mortem report revealed that he was strangled to death, the police said.
"After a through probe, it was discovered that Vishwakarma used to thrash his wife accusing her of having an affair with Yadav. He learnt about the affair between his wife and Yadav in September 2010," a crime branch official said.
Enraged at his lover being thrashed, Yadav allegedly conspired to eliminate Vishwakarma in September 2011 with his friend and accomplice Pramod Sharma.
"Yadav called Sharma to Mumbai on September 13 and told him to stay on rent in Hanuman Nagar area, where the victim stayed. Three days later, Sharma telephoned Vishwakarma to carry out carpentry work at his house. As the victim reached his house, Sharma strangled him to death. He then telephoned Yadav and both of them disposed off Vishwakarma's body in the intervening night of September 16 and 17," senior inspector of crime branch unit XI R Dalvi said.
A manhunt has been launched for Sharma, while Yadav will be produced before a local court tomorrow, the police said.