Hi, my boyfriend was just arrested for hitting a concrete guard with his truck (he was drinking) and I was wondering if this is his first time being arrested and he has no previous encounters with the law will they deport him back to Mexico? I am currently pregnant with his child and I can't do this alone!

They will not deport him for hitting a wall, and driving drunk, if he is a legal resident, if he is a illegal alien then yes of course they are likely to deport him.

Your being pregnant will not make any difference, this is a risk you decided to take, so merely move back to his country with him, and you will not be alone