FT Violation?

[Troward]

I worked a Mens league recently where the players seemed adept at stepping into the FT lane just before the FT hit the rim. I was having a real hard time determining when/if they violated because it was a split second difference.

I'm starting to think going on the release would be a lot easier to observe.

Does any one have any tips/techniques they use to observe this FT lane activity accurately?