What are the options available when wife files a fake dowry case

My cousin bro wife already give fake dowry complaint in local police station... Police already enquired and closed the fake dowry complaint... Now my cousin brother is planning to file a divorce case against his wife.. My question is 1. police already closed the fake dowry complaint however is there any possibility to file 498a dowry case against my cousin brother and his family members ? 2. Cousin bro wife is in her parents home for last one and half year , is there any possibility to file DV case in court ? BCS I searched in Google many of the lawyers comments is if couples separated more than one year there is no possibility to file DV case ? Kindly answer my two above questions .