I am involved in a dispute over family property, an unfunded Trust, and my brother's actions. What should I do to protect my interests?

Piseco NY Trust created 1999. Our dad died 9/29/2000. Our mom insisted on running the business(free and clear trailer park and cottages), but was an alcoholic and couldn't. Albany NY 2004 brother and I moved her to senior housing, and he got a POA to run the business. We had an unformal agreement that I would get some $$$ every year, but he would keep the rest. Glenmont NY 2006 she moved in with brother. Averill Park, NY 2009 brother threw her out I took her in. Averill Park 1 month broken hip. She ended up in Sanford Home in Amsterdam. 2015 after years of claims that there was not much income because of repairs and upkeep, a piece of property that I assumed was part of the trust. Brother said for "some reason" that piece of property was not in the trust. On advice of an attorney I visited the county clerk's office in Lake Pleasant NY. NONE of the property was ever placed in the trust. Much more. Ran out of space.