POA question; caring for 2.

Bear with me here... a little confusing and apologies in advance :)
Mom -- Bedridden, failing health, she has:
3 Children:
Child 1 has late stage dementia and was written out of the will for his own Medicaid purposes last year
Child 2 has POA over Child 1
Child 3 has POA over Mom
Child 1 is STILL DRIVING a vehicle titled in Mom's name. Child 2 refuses to take any action like taking keys away, reporting to BMV, changing the title, etc. to get the driving to stop.
Would Child 3 have a legit reason to transfer land/property into their own name (away from Mom's) in order to protect/save the property in case Child 1 hits and kills someone and they sue Mom to get the property? Child 2 & Child 3 are beneficiaries in the will and listed to "share and share alike" all property. Or, would this be considered self-dealing? If self dealing, is there another way to protect her property from the Child 1 with the late stage dementia? Child 3 does not want the vehicle titled in their name and even if Child 2 titles the vehicle in their name and allows Child 1 to continue to drive, the property still seems to be at risk because of Child 2 in the will. Advice? asking for a friend...