According to police, the victim's clothes had been sent to a laboratory in Hyderabad for DNA fingerprinting tests.
Citing lack of evidence and the prosecution's failure in proving the case, a sessions court in Mumbai on Wednesday acquitted Abhishek Kasliwal, son of the owner of Shriram Mills, in a 2006 rape case
Kasliwal is accused of raping a 52-year-old woman on March 11.
A local court on Friday had allowed Mumbai police to subject Abhishek to scientific tests.
Justice V K Tahilramani allowed him to go abroad on the condition that he deposit Rs 50,000 with the investigating officer of the case every time he travels.
According to the woman, the accused offered her a lift sometime after 0230 IST on March 11 near the Prince of Wales Museum in South Mumbai's Colaba.