The crown and defence have summed up their cases at the Hamilton High Court following an alleged illegal street race in the Waikato that resulted in the death of four people in 2016.
Dylan Cossey, 20, fled from the crash scene near Hamilton Airport on the night of June 24, with Stephen John Jones, 20, in the front passenger seat.
Lance Tyrone Robinson, 28, Hannah Leis Strickett-Craze, 24, Paul de Silva, 20, and Jason McCormick Ross, 19, died after the Nissan Skyline they were travelling in lost control and crashed.
The alleged race between the Honda Integra Cossey was driving, and the Skyline driven by Mr Robinson, reached estimated speeds of more than 150km/h.
It came to a sudden end when the Nissan collided with an oncoming van about 10pm.
Cossey and Jones have been charged with four counts of manslaughter, causing injury to the van's driver and failing to stop to ascertain injury.
Jones is also facing one count of attempting to pervert the course of justice after editing a video he made on his mobile phone of what happened that night.
Crown prosecutor Duncan McWilliam told the jury the eye witnesses clearly described a race that evening which resulted in the accident involving Mr Robinson and the two defendants.
"They panicked and gapped it knowing what they have done, and what they had just caused."
Mr McWilliam then highlighted Jones' altering of the film as the smoking gun.
"The trimming has been done to remove damming evidence of the speed they were going that night."
Cossey's lawyer Philip Morgan QC argued there was no suggestion his client was trying to keep up with the other driver when the accident occurred.
"It's Mr Robinson who is over taking and loses control on the corner.
"He was fuelled up on alcohol, two and a half times over the limit to be driving, and under the influence of methamphetamine."
Jones's counsel Russell Boot told the jury his client was merely a passenger that did nothing more than film an overtaking manoeuvre.
Justice Anne Hinton will sum up the trial on Monday.
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