[Cory]

The way we looked at it at Sacramento was that if a team illegally introduced a tetra, we followed it until that team either scored it or dropped it. If it was scored we remembered to not count it at the end of the match. If it was dropped by the offending team, and left alone for a sufficient amount of time, it was considered legal, as we could not be expected to do nothing but follow tetras around the field.

My answer to this would be it depends on how long it sat on the ground before the alliance partner picked it up and scored it.