Attorneys allege a “complex conspiracy to murder” the rapper Tupac Shakur, Photo by Al Pereira/Getty Images In 1996, rapper Tupac Shakur was murdered on the Las Vegas strip. The case stumped investigators for decades until 2023, when Duane Keith “Keffe D” Davis was ultimately arrested for the killing . On Tuesday, attorneys for Maurice Shakur, Shakur’s stepbrother, filed a new wrongful death lawsuit to find out if there are other parties involved with an alleged “complex conspiracy to murder Tupac that involved much more than mere retaliation for a prior altercation.” “Many individuals who were involved have long since passed way, while others have been hard to identify,” reads the complaint, as reported by Rolling Stone . “Yet, one thing is certain: there remain individuals who were involved in Tupac’s murder who, for 30 years, have not been held accountable for their crimes.…