A far-fetched solution
Consider this : Twins are born (lets say two boys A and B) - biological parents die - ends up in foster care - then each are adopted separately.
Lets say their worlds never collided until that fateful day of the accident.
'A' was with his father in the car and lets say this accident took place at 'X'.
Now 'B' had told his parents that day before leaving home that he had some work around the place of 'X'. So when 'B' father/mother who is a surgeon sees the body of 'A' then naturally he/she could say those lines.
Maybe there are some loopholes in this story but still its possible right.
Also it just so happens that 'A' and 'B' were wearing the same exact dress that day :)