Body of Abhishek Yadav was found dumped in an isolated place in Vasai in the district on Sunday in a highly decomposed condition, a police officer said.
"The body was found about 100 metres from the Mumbai-Ahmedabad Highway in forest area and was buried on Sunday evening itself," said inspector Narayan Patil of Waliv police station.
According to Station House Officer, Kurla GRP, a case under section 363 of IPC (punishment for kidnapping) was initially registered against the parents of the girl's family, but with the recovery of Yadav's body the police have added section 302 (punishment for murder) of IPC against them.
After lodging a complaint against Yadav for kidnapping the girl (19) from Jaunpur, the parents of the girl allegedly followed him to Mumbai and murdered him after abducting him, the SHO said.
Police are yet to make any arrest in this connection.