Wasn't targeting, he was considered a running back at that point, not a defenseless player and the defender did not use the crown of his helmet. You need one of those two.

2019 NCAA® FOOTBALL
RULES AND
INTERPRETATIONS

quote:
Targeting and Making Forcible Contact
With the Crown of the Helmet

ARTICLE 3. No player shall target and make forcible contact against an
opponent with the crown of his helmet. This foul requires that there be at least
one indicator of targeting (See Note 1 below). When in question, it is a foul.
(Rule 9-6) (A.R. 9-1-3-I)

Targeting and Making Forcible Contact to Head
or Neck Area of a Defenseless Player

ARTICLE 4. No player shall target and make forcible contact to the head
or neck area of a defenseless opponent (See Note 2 below) with the helmet,
forearm, hand, fist, elbow or shoulder. This foul requires that there be at least
one indicator of targeting (See Note 1 below). When in question, it is a foul
(Rules 2-27-14 and 9-6). (A.R. 9-1-4-I-VI)

Note 1: “Targeting” means that a player takes aim at an opponent for purposes
of attacking with forcible contact that goes beyond making a legal tackle or a
legal block or playing the ball. Some indicators of targeting include but are not
limited to:

• Launch—a player leaving his feet to attack an opponent by an upward
and forward thrust of the body to make forcible contact in the head or
neck area

• A crouch followed by an upward and forward thrust to attack with
forcible contact at the head or neck area, even though one or both feet
are still on the ground

• Leading with helmet, shoulder, forearm, fist, hand or elbow to attack
with forcible contact at the head or neck area

• Lowering the head before attacking by initiating forcible contact with
the crown of the helmet

Note 2: Defenseless player (Rule 2-27-14). When in question, a player is defenseless.

Examples of defenseless players include but are not limited to:

• A player in the act of or just after throwing a pass.

• A receiver attempting to catch a forward pass or in position to receive a
backward pass, or one who has completed a catch and has not had time
to protect himself or has not clearly become a ball carrier.

• A kicker in the act of or just after kicking a ball, or during the kick or
the return.

• A kick returner attempting to catch or recover a kick, or one who has
completed a catch or recovery and has not had time to protect himself
or has not clearly become a ball carrier..

• A player on the ground.

• A player obviously out of the play.

• A player who receives a blind-side block.

• A ball carrier already in the grasp of an opponent and whose forward
progress has been stopped.

• A quarterback any time after a change of possession

• A ball carrier who has obviously given himself up and is sliding feet first.