rti act

Hai can we know th details job and details of salary of person who was repeatedly trying to obscund and try to hide his work details by rti act. As my sister got married 12 years back with a software in vijayawada AP soon after marriage his father in law lost his life due to heart conditions in 3 months after marriage and within 8 months his elder brother was brutally murdered by his won son due to some land disputes. Here begins problems to my sister with his family where they used to blame her repeatedly for deaths that occured due to my sister entry to there house. Repeatedly they tried to sent her out of there house and beat her but as my dad was so innocent always tried to compromise and on one day she tried to kill herself by drinking harpic in bathroom. At this critical time they tried ti hide her without informing us and with help of doctor our sister contacted us and we rescued her with a major surgery without which she may loose her life. From then onwards she is staying with us along with her two girl childs. From then no help or enquiry regarding children or my sister from them. Hence we lodged an FIR. Its been 6 years no resolution and courts are in vail. And our lawer trying to compromise us with a very little money and we know that he was corrupted with our opposite party. In recent hearing in court they asked about evidence for gold and other expenses during marriage which we dont have. so kindly we want some advice from you. we stay in visakhapatnam Ap. Now we are in court for maintainence for which we are asked to provide pay slips of my sister husband which we do not know anything about him. can we apply for rti for his monthly income details. kindly advice further approach which is very munch appreciated. Thanking you