Peter Fox , 26 , has been arrested in Bootle on suspicion of double murder . His sister Sarah , 27 , was found dead at her home in London on Thursday . Mother Bernadette , 57 , was later found dead at sheltered accommodation . Fox was arrested at Euston station after he was seen by member of public .
Peter Fox , 26 , has been arrested in London on suspicion of double murder . His sister Sarah , 27 , was found dead at her home in Bootle on Thursday . Mother Bernadette , 57 , was later found dead at sheltered accommodation . Fox was arrested at Euston station after he was seen by member of public .