Immigrants

There are alot of illegal immigrants in the U.S.A. But I know only one person. He came here from pakistan with his family. He got a visa for two years and after two years he liked it here so he stayed here for another two years and the country warned him to leave but he would refuse. So they put him in jail for a couple of weeks and scared him. Later on he took his family's hands and went back to pakistan, and i dont get to see my friend anymore.
The U.S.A deals with immigrants in this country by scaring them or they have to send them back to there country or in other words they deport them back or you have to give them a fine which i dont know how much. Or they will have to do military service or community service. As you can see it a very complex situation.