peter fox , from liverpool , was arrested at euston station in london this morning on suspicion of the murders of bernadette , 57 , and sarah fox , 27 , following a nationwide manhunt .
cctv images of the 26-year-old leaving liverpool lime street at 8.18 pm on wednesday and arriving at euston railway station in the capital at 10.57 pm .
the body of his sister was found by police on thursday night , just hours before her 57-year-old mother bernadette was found dead at sheltered accommodation just half a mile away in bootle , merseyside .