User blog comment:Garhdo/Plot hole?/@comment-2250460-20111230215428/@comment-1900300-20111231020126

A) Scanning the DNA of a body in space several hundred meters away without having physical contact sounds VERY hard to believe. Their is elements of technology that the Collectors have but to take DNA samples from a dead body in a space suit a mile away is sounds more like magic that we would have to swallow. What the thing scans an area of over a miles radi from the ship and compares all DNA scanned to Shepard. incidentally how would the Collectors have a sample of Shepards DNA to compare with in the first place?

B) No tractor beam was used on the Normandy. The Reaper IFF had sent a virus to give away the ship's position and to cut the engines. Basically the Normandy could not move and the Collectors could come to it. No tractor beam there.