Both Sirocco and Tricker assumed control of what was left of the Eastmans after Zelig was killed by "Red" Phil Davidson shortly before he could testify against NYPD Lieutenant Charles Becker on October 5, 1912, in a trial for the murder of Herman Rosenthal. After this what was left of the Eastmans began to crumble and the gang finally disintegrated.
Both Sirocco and Tricker took control of what remained of the Eastmans after Zelig was killed by "Red" Phil Davidson just before he could testify against NYPD Lieutenant Charles Becker in a murder trial on October 5, 1912. Following this, what was left of the Eastmans began to disintegrate, and the gang ultimately collapsed.