please I haven't seen her since 55 years where I born in Royal Victoria Hospital, Montreal, Quebec  on July 21, 1961, she has signed my birth certificate also I received the letter from Batshaw Office as I notified that her name was Mary (Mabe). I have been search for her in few years ago but NO LUCK for me to match my DNA as I am wondering to ask you as if you know her grandparent whom werekilled by car accident in 1957. She was little girl whom was living in Gaspe, Quebec.

One thing to check is whether a death record can be found for her. Since you are a living relative, you should be able to contact the directeur de l'état civil. Otherwise, this sounds more like the realm of private investigation than genealogy.

https://www.bac-lac.gc.ca/eng/discover/genealogy/places/Pages/quebec.aspx#a