The jailed Brooklyn, New York thief widely believed to be the man who killed Tupac Shakur has spoken out against the murder allegations, insisting he's actually helping the rapper's father investigate his son's death. WALTER 'KING TUT' JOHNSON has opened up to America's King magazine from behind the bars of a Virginia prison, where he's serving a life sentence for successive armed robberies after becoming the first New Yorker to be sentenced under America's 'Three Strikes' provision. Johnson insists he's happy to serve time for a series of holdups and robberies, but he's tired of being linked to the 1996 murder of Shakur, who named him among the potential shooters who tried to kill him in 1994. He says, "I can understand why the Tupac fans would not like me... but I want them to know that I'm definitely not responsible for his attempted assassination, nor did I have anything to do with his assassination. "Find me guilty if I'm wrong. Prosecute me to the fullest degree of the law possible... Even though I was a bad guy in my younger years, I didn't do this." Johnson insists there's a law enforcement cover-up surrounding Shakur and his one-time rival Notorious BIG's murders, and he's encouraging the curious to dig deep for the truth. He adds, "With this story, there's only one way to find the truth: remove the lies and inconsistencies. "I guarantee that if you come into the case you will find that there have been cover-ups and smoke screening." In the article, Johnson reveals he is working with Shakur's father, MUTULU SHAKUR, and family private investigator WATANI TYEHIMBA as they attempt to uncover the truth behind the rap superstar's murder.