Bernstein and the others soon formed an association with longtime mobsters
Charles Leiter and
Henry Shorr; by the early 1920s they were working exclusively as enforcers for the latter mobsters. Their open executions of targets on the street terrorized the city. Bernstein and several other members were later arrested three days after the murder of Detroit policeman Vivian Welsh. The
Chevrolet coupe used in his murder was traced to Bernstein's brother Raymond, but Abe was released due to lack of evidence. This decision may have resulted from press reports that alleged the deceased Welsh had been a "dirty cop," extorting money from independent bootleggers and speakeasy operators. Abe Bernstein and other gang members were under continual police surveillance. Several years later, Raymond Bernstein was convicted of first degree murder in a different case. In March 1928, Bernstein was arrested and charged with conspiracy to extort money from the city's wholesale dry cleaners industry. Arrested and charged with Bernstein were Purple Gang members Raymond Bernstein, Irving Milberg, Eddie Fletcher, Joe Miller, Irving Shapiro, Abe Kaminsky, and brothers Abe and Simon Axler. Police were initially unable to locate Bernstein; he had been attending a mobster
Atlantic City Conference with
Meyer Lansky and
Charles "Lucky" Luciano. After returning to Detroit several days later, Bernstein surrendered to authorities and posted a $500
bail bond. Beginning June 4, 1928, forty-two witnesses testified over a three-month period before Judge Charles Bowles. A jury acquitted all the defendants of all charges. ==Involvement in the St. Valentine's Day Massacre==