Vid Request: Iowa vs MSU - LGP outside of arc retreating

[bucky]

With 57 seconds remaining in the first half, MSU player drives. Secondary defender establishes LGP in front of the arc and retreats with contact occurring once in the arc. L calls blocking foul pointing at arc. Seems like wrong call or at least wrong reason for the call. Perhaps L did not see that LGP was established outside of arc. ??