Scrimmage Kick/PSK or What??

[BoBo]

It is 4th and 6 from K's 40 yard line.

K is in scrimmage kick formation.

K punts the ball to R

While the kick is in the air R55 holds K46 at R's 30 yard line,

R22 catches the ball at R's 25 yard line and begins his return. He begins to retreat to try and get to his blocking wall. R22 is tackled at his own 10 yardline (R's 10 yard line).

As the White Hat what options/enforcement do you give?