Incorrect administration of free throw (inadvertent horn)

[Rich]

Originally Posted by Nevadaref

Billy,
You cannot allow the FT to attempt and if he misses give him another try because of the horn. That would be unfair to the opposing team, which didn’t do anything wrong.
Either allow play to continue and the result of the attempt stands or whistle it dead immediately and deal with the horn, then come back and readminister the FT.

This.