"The DNA in a sample taken from the victim’s nails did not match that of Mainali but it matched that of semen found inside the victim's body leading to the Tokyo High Court granting him a retrial, according to the Kyodo News Agency".

My question is , How  the girl who was killed got the semen inside her body? Was she a call girl and Mr. Mainali was engaged?

 Can Mainali sue for imprisoned for his jailed time?