Best way to handle?

[PG_Ref]

Per the NFHS officials manual ... 2.3.2. D. 3 (Two person)
When the ball goes out of bounds and the responsible official needs help, he/she should look in the direction of the other official. That official should be prepared to give assistance. If the responsible official asks for assistance, the other official should verbally and visually signal the appropriate call - the officials do not need to confer in this situation.

(Three person) 3.3.2. D. 4

When the ball goes out of bounds and the responsible official needs help, he/she should look in the direction of the nearer official or the official sharing that area of responsibility. That nearby official should be prepared to give assistance. If the responsible official asks for assistance, the nearby official should verbally and visually signal the appropriate call - the officials do not need to confer in this situation. On the other hand, if a non-responsible official has information regarding the out-of-bounds call, he/she may quickly approach the calling official to share the information and then leave the call to the responsible official.