By June 1973, an apparatus that would become the FBI's Joint Terrorism Task Force (JTTF) was issuing nearly daily briefings on Shakur's status and the allegations against her.
On May 2, 1973, at about 12:45 a.m., Assata Shakur, along with Zayd Malik Shakur (born James F. Costan) and Sundiata Acoli (born Clark Squire), were stopped on the New Jersey Turnpike in East Brunswick for driving with a broken tail light by State Trooper James Harper, backed up by Trooper Werner Foerster in a second patrol vehicle. The vehicle was also "slightly" exceeding the speed limit. Recordings of Trooper Harper calling the dispatcher were played at the trials of both Acoli and Assata Shakur. The stop occurred 200 yards (183 m) south of what was then the Turnpike Authority administration building. Acoli was driving the two-door vehicle, Assata Shakur was seated in the right front seat, and Zayd Shakur was in the right rear seat. Trooper Harper asked the driver for identification, noticed a discrepancy, asked him to get out of the car, and questioned him at the rear of the vehicle.
Between 1973 and 1977, in New York and New Jersey, Shakur was indicted ten times, resulting in seven different criminal trials. Shakur was charged with two bank robberies, the kidnapping of a Brooklyn heroin dealer, the attempted murder of two Queens police officers stemming from a January 23, 1973, failed ambush, and eight other felonies related to the Turnpike shootout. Of these trials, three resulted in acquittals, one in a hung jury, one in a change of venue, one in a mistrial due to pregnancy, and one in a conviction; three indictments were dismissed without trial.
On the charges related to the New Jersey Turnpike shootout, New Jersey Superior Court Judge Leon Gerofsky ordered a change of venue in 1973 from Middlesex to Morris County, New Jersey, saying "it was almost impossible to obtain a jury here comprising people willing to accept the responsibility of impartiality so that defendants will be protected from transitory passion and prejudice." Polls of residents in Middlesex County, where Acoli had been convicted less than three years earlier, showed that 83% knew her identity and 70% said she was guilty.
In December 1973, Shakur was tried for a September 29, 1972, $3,700 robbery of the Manufacturer's Hanover Trust Company in the Bronx, along with co-defendant Kamau Sadiki (born Fred Hilton). In light of the pending murder prosecution against Shakur in New Jersey state court, her lawyers requested that the trial be postponed for six months to permit further preparation. Judge Lee P. Gagliardi denied a postponement, and the Second Circuit denied Shakur's petition for mandamus. In protest, the lawyers stayed mute, and Shakur and Sadiki conducted their own defense. Seven other BLA members were indicted by District Attorney Eugene Gold in connection with the series of holdups and shootings on the same day, who—according to Gold—represented the "top echelon" of the BLA as determined by a year-long investigation.
The Turnpike shootout proceedings continued with Judge John E. Bachman in Middlesex County. New Jersey Superior Court Judge Leon Gerofsky ordered a change of venue in 1973 from Middlesex to Morris County, New Jersey, saying "it was almost impossible to obtain a jury here comprising people willing to accept the responsibility of impartiality so that defendants will be protected from transitory passion and prejudice." Morris County, had a far smaller black population than Middlesex County. On this basis, Shakur unsuccessfully attempted to remove the trial to federal court.
Shakur and four others (including Fred Hilton, Avon White, and Andrew Jackson) were indicted in the State Supreme Court in the Bronx on December 31, 1973, on charges of attempting to shoot and kill two policemen—Michael O'Reilly and Roy Polliana, who were wounded but had since returned to duty—in an ambush in St. Albans, Queens on January 28, 1973. On March 5, 1974, two new defendants (Jeannette Jefferson and Robert Hayes) were named in an indictment involving the same charges. On April 26, while Shakur was pregnant, New Jersey Governor Brendan Byrne signed an extradition order to move Shakur to New York to face two counts of attempted murder, attempted assault, and possession of dangerous weapons related to the alleged ambush; however, Shakur declined to waive her right to an extradition hearing, and asked for a full hearing before Middlesex County Court Judge John E. Bachman.
In July 1973, after being indicted by a grand jury, Shakur pleaded not guilty in Federal Court in Brooklyn to an indictment related to a $7,700 robbery of the Bankers Trust Company bank in Queens on August 31, 1971. Judge Jacob Mishlerset set a tentative trial date of November 5 that year. The trial was delayed until 1976, when Shakur was represented by Stanley Cohen and Evelyn Williams. In this trial, Shakur acted as her own co-counsel and told the jury in her opening testimony: