A witness has described the tragic final moments of a 21-year-old woman’s life after bystanders were unable to give CPR in the desperate moments before first responders arrived. They could not help because of how she was trapped in her car after a rollover near Baldivis. Police say the young woman was driving a Nissan X-Trail. It and a Nissan Maxima being driven by a 28-year-old woman travelling north on Kwinana Freeway collided on Wednesday night. Floral tributes and a handwritten note were laid at the crash site on Thursday afternoon. Deacon Tremain, 21, was driving on to the freeway at Mundijong/Kulija Road about 11.30pm when he noticed a truck in front slow down. “I ended up slowing down and stopping as well,” Mr Tremain said. “There was glass on the road, so I looked to my side and there was a car on the road that had stopped.” He saw a woman whose car had spun out into the emergency lane. She said she was OK. Mr Tremain said the 28-year-old woman initially believed she had been side-swiped in a hit-and-run but 10 minutes later, she, Mr Tremain and another bystander saw debris further down the road. About 100m down the road they found the Nissan X-Trail had rolled over onto the cycle path and was lying on its left side. “I could see the engine (and the) roof facing opposite to the road, driver’s side up,” Mr Tremain said, adding someone checked the driver’s pulse and said she was still alive. “Once we saw that I immediately called all of the emergency services and another guy (at the scene) . . . checked her pulse and said she had a pulse.” The 21-year-old dialled triple-0 at 11.50pm. “Two or three of us heard a phone ring (from inside the car) … we called out and no response,” he said. “I couldn’t see anyone in the car at all. The whole back of the boot got torn off the back of the car and was about 10m away.” St John WA confirmed it received the emergency call at 11.55pm and that paramedics arrived on scene a short time later at 12.02am. There was a further delay getting to the critically injured woman, however, as paramedics were forced to wait for Department of Fire and Emergency Services crews to arrive before gaining access to the victim. A DFES spokesperson said two crews from Rockingham Career and Fire Rescue Service arrived at the scene about 12.04am. Paramedics had to wait for fire crews to free the woman from the crushed car. Police said the 21-year-old woman died at the scene and St John WA confirmed paramedics were not required to transport the patient to hospital. Mr Tremain said once emergency services arrived, some bystanders left but he stayed until he was told he could leave. “I was going back and forth . . . to the X-Trail and the 28-year-old woman,” he said. “She was in a lot of shock and then obviously seeing the car had rolled over . . . she got really scared.” He left a short time later and didn’t find out the young woman had died until Thursday afternoon. “I was just getting replays of the whole thing. There have been a lot of accidents at the same spot (on the Kwinana Freeway),” he said. Just days earlier, Mr Tremain and his partner, Andrew Kiernan, were in a similar crash near the Kwinana Freeway’s South St exit. The couple were in their brand new Mercedes-Benz C200 S-Class when things went awry. “The car completely malfunctioned while we were on the highway,” Mr Tremain said. Another car hit the pair and they spun out. “The whole new smart car shut off,” he said. “It almost killed us.” If you or anyone you know has been affected by a road crash, contact Road Trauma Support WA on 1300 004 814.