I know someone who I believe conned the DWP into early retirement.?

A relative of mine ( spinster never been married own house), who has caused me many personal problems, about 10 years ago "conned" the DWP into early retirement on the grounds of "ill health". I remember the battle with the DWP who were convinced there was insufficient grounds but eventually backed down. Since then this relative (within the 1st 12 months) got another very elderly relative to sign her monies over to her in return for moving in with her. This relative of mine had a meagre pension by the way. Within 2 years the relative has the elderly woman put into a nursing home (e.g. probably conned DWP again into thinking the elderly woman is penniless so the state pays the nursing home) while she lives in the lap of luxury spending this ladies monies on house improvements, holidays, and new cars. In addition to this she leads a very active lifestyle, volunteer work with the police, runs homewatch, etc on her feet all day. Personally, I think there is nothing stopping her working full time? Would the DWP take this on as a re-investigation?