No, if you're referring to Justin Bieber the singer. He wasn't born until 1994 so its not possible that he could have been assassinated in 1959.
Justin Boyle was born in 1959.
Justin Catanoso was born on 1959-11-05.
Justin Colfax Morgan died in 1959.
Justin J. McCarthy died in 1959.
Michael Whitley died in 1959.
Michael Bumgarner was born in 1959.
Michael Lacey was born in 1959.
My Brother Michael was created in 1959.
Michael Marcour was born in 1959.
Michael Cavlan was born in 1959.
Michael Kanteena was born in 1959.
Michael Greif was born in 1959.