How can we stop step-brother from selling our land?

Land that is already sold can be reversed through a court order, especially if proved that the sale was either illegal or fraudulent. [PHOTO: FILE/STANDARD]

My father had seven wives and many children. He also had large parcels of land. He passed on without dividing the land among us. For almost six years, there have been efforts by the extended family elders to divide the land, but some members of our family are opposed to the idea. They gave up and left the matter to us as a family. In 2014, one of the sons colluded with his mother and sold off a section of the land without the consent of other family members. He is now planning to sell another piece of land without our consent. Are there any legal steps we can take to bar him from selling another piece of land and also recover the one already sold? And are there legal steps we can follow to divide the land among us?

Gordon Taylor, Homa Bay.