Justice for John Reyes

My son is facing charges of second degree murder and vehicular manslaughter. He awaits sentencing. He's had two trials, the first one resulted in a mistrial.
Over a year ago my son and his friend were driving on a windy mountain road. My son lost control of the car, overcorrected and the car went off the road, killing his friend instantly. The Calif. Highway Patrol Officer ticketed my son, John Reyes, with vehicular manslaughter and said it was a high speed accident. However, he was not allowed to give his expert opinion at the second trial, as he was allowed in the first trial. The CHP also said he did not know if John saw him behind him. The driver behind my son did not see the CHP. The DA was successful to convince the jury that my son saw the CHP behind him because he was on the "lookout" and was speeding to get away from the CHP. The DA purposely kept out witnesses that would have said my son was driving too fast long before the CHP was behind him. Somehow, the witness log was lost. The DA said my son was avoiding going back to jail, however after the accident my son walked towards the CHP and sat by him during the investigation.
John was not high on drugs, but his friend was very high and wanted John to drive his car. This information was kept out of court. I spoke to John in jail when he was medicated on three different perscriptions because he was so distraught. He was extremely remorseful over the loss of his friend. Much of what he told me was scattered and unclear. However, the DA called me as a witness against my son and drilled me regarding our conversations. It made John look like a liar because what he told me while heavily medicated and sleep deprived was not what he said in court and of sound mind. The trial was highly prejudiced because my son had a record, and a previous offense of evading, though never a violent offender.
He was not allowed to have any character witnesses at his trial. The DA purposely subpoenaed John's grandparents with the intent of keeping them out of court. They could not be in court if they were considered a witness. He never called them to the stand or questioned them privately. John was taking care of both of them at the time and they would have been wonderful character witnesses for John. Some of the questions the DA asked me would have been better answered by John's grandparents because they had to do with the grandparents car, yet the DA never questioned them or called them.
The first trial resulted in a mistrial because our attorney became very ill and had to be hospitalized. The jurors were polled at the time by the DA and none of them were leaning towards convicted John of second degree murder. We had to have a different attorney. The DA was successful in changing motions for the second trial and kept out testimony and witnesses that would of been beneficial or provided justice to this case.
The state of California requires 15 years to life if convicted of second degree murder. Please sign our petition asking the judge to drop the second degree murder charge. My son will be sentenced to enough years for vehicular manslaughter.