"We have an eye witnesses account and circumstantial evidence to establish rape and our charges are based on them," Superintendent of Police (north) Bosco George said.

The medical report has not confirmed presence of sperms in vagina or mouth of Scarlett, which virtually ruled out any sexual intercourse or oral sex prior to her death.

"The post-mortem report indicates that there were tears on vagina which are clear indications of sexual intercourse," George said.

British teenager Scarlett Eden Keeling's bruised semi nude corpse was found on Anjuna shore on February 18. The police have already charge sheeted two locals -- Samson D'souza and Placido Carvalho -- for allegedly drugging, raping and leaving Scarlett to die on shore.