The boy, now 15, showed no emotion while the girl, 13, sobbed in the dock as the judgments were handed down after the jury debated for more than six hours.
In an emotional statement given on the court steps, Mr. Kohli’s daughter Susan paid tribute to her “amazing” father who was “brutally and cruelly” taken away.
The teenagers will be sentenced next month when a judge will consider lifting their anonymity. Judge Mr. Justice Turner granted the girl bail but stated that it was “no indication” of what would be decided when she is sentenced.
The boy was remanded in custody.