Lachance was half in/half out with the 4 from just past the 3/4’s pole.
Hershberger drove up the seam with the 7 but his horse caught Lachance’s wheel with his front right.
Judges deemed Lachance caused Hershberger horse to go off stride and leave the course.
Just look at the chart. They gave the 7 an interference break at 3/4’s before the stretch.