The fate of a 47-year-old Leamington man is in the hands of the jury.
Andrew Cowan stands accused of first degree murder in an October 2012 crash that claimed the life of Edward Witt.
Justice Kelly Gowman spent about an hour giving her instructions to the jury.
The initial pool of 14 jurors was reduced to 13 when one of them asked to be excused because she didn't believe she could spend a night in a hotel if the deliberations went long.
Another member was dismissed in a lottery process to get to the number 12.
Justice Gowman laid out the ground rules for jurors to decide on the evidence before explaining the points of law governing the case.
She explained the theories of both the defence and crown and detailed which evidence supported each position.
The case turns on whether jurors believe the defence position that it was a legitimate "suicide pact" between the 2 which Cowan never expected to survive.
The jury can find Cowan guilty of 1st or 2nd degree murder or manslaughter or could find him not guilty.