Scott Berlin, owner of Berlin Bail Bonds, who relies on writing bonds for the release of detained immigrants to bring in more business, in Newark, N.J., June 12, 2017.

Scott Berlin's father, the son of Russian immigrants, founded Berlin Bail Bonds in Newark in 1930, providing cash to release defendants in the state and federal courts in that gritty New Jersey city.

The family bond business is still going, but to survive, it is leaning on what used to be a small sideline: writing bonds for the release of detained immigrants.