It means it could have been William; it wasn't the other child.
From Lia Harris:
We’ve just had some of this morning’s testimony clarified. The child in the SpiderMan suit seen by a neighbour in the car was not identified. There was another child nearby who had been wearing the costume, but it was later found NOT to have been that child.
@10Daily @10NewsFirst
Lia HarrisVerified account @LiaJHarris 7m7 minutes ago
Detective Sergeant Beacroft told the court there was a child across the road from where the man saw the car who had a Spider Man suit, but she later spoke to that child’s mother and found it was “not possible” it was her child he saw.
@10NewsFirst @10Daily
Lia HarrisVerified account @LiaJHarris 6m6 minutes ago
The car with the child in the backseat was seen driving past the man’s house on Laurel St, from the direction of Batar Creek Rd.
@10NewsFirst @10Daily
Lia HarrisVerified account @LiaJHarris 24s24 seconds ago
To clarify, the child that the neighbour, Ronald Chapman, says he saw wearing the Spider Man suit has not been identified.
@10NewsFirst @10Daily