At the murder trial of Grapefruit Sampson, the prosecution w…

At the murder trial of Grapefruit Sampson, the prosecution wants to introduce the testimonial evidence of Kota Kologne.  Kologne will testify he knows that Sampson murdered the victims because Sampson told their friend Al as Sampson and Al were driving down the freeway in Sampson’s Chevy Saurus.  Sampson’s attorney should object on what ground: