"The cutter launched a boarding team that interdicted the vessel without the use of force, according to the Coast Guard. Authorities said all 16 individuals aboard the boat claimed Mexican nationality. The migrants were transferred to the custody of U.S. Border Patrol at Ballast Point."
So... they STILL ended up in the USA.
They should have been immediately returned to Mexican territory.
Take them within a few feet of the Mexican shore just south of the border, and put them in the water.
Then tow the empty boat out to sea and sink it.
Works for me.