The court was told that the group — who had been travelling to visit Joshua's father in Ogun State, near Lagos, last December — were asleep when Kayode lost control of his Lexus SUV while overtaking a moving truck and collided with a parked lorry.
Joshua's personal trainer, Latif Ayodele, and strength coach, Sina Ghami, died in the crash.
A second defendant, Abubakar Adamu, 35, the driver of the stationary lorry the car collided with, denies a charge against him of obstructing the free flow of traffic.
Inspector Christopher Ajayi Taiwo of the Ogun State Motor Traffic Division told the court that by the time he arrived at the scene, both the damaged Lexus and the stationary lorry had been removed. However, debris from the crash and soya beans scattered on the road from the lorry's load were found by officers.
The only items recovered from the Lexus were a logbook, painkillers, and an energy drink, which were found near the driver's side, Ajayi said.