False case of Dowry, Abatement to Suicide

One of my colleague's wife has lodged a complaint in Mahila Thana against him, his mother and his one of the female colleague. The complaint includes Dowry, Illicit relationship and provoking the lady to commit suicide. The IO at Mahila Thana has called all the three whose name has been mentioned in the complaint as the complainant will only come if the female colleague of the man will be called. I want to know what type of complaints are entertained in the Mahila Thana. is there a possibility that the FIR can be lodged against the unmarried girl? My colleague and his wife got married in 2010. His wife used to give him money for payment towards LIC, Medical Insurance, and Car Insurance. Will this count as a dowry or mutual understanding between a husband and wife? it is an inter-religion marriage where the couples were living in the father's house of the girl. The lady conspired to commit suicide by sending a whats app message to her husband and her mother in law alleging for dowry and extra marital affair. We are looking for a good lawyer too.