On the night of the shooting, Ms Lyons was walking home from a day's work at telecommunications store AT&T when she saw a police officer running toward her with his gun out. "We were about 100 metres from where Elliot crashed."
Ms Lyons said chaos ensued as she was ushered into a house with her boyfriend.
"I texted my mom and said 'mom, there's been a shooting' but it wasn't on the news at that point. Nobody realised the extent of what had happened."
Ms Lyons said it was "very surreal" to think that she could have found herself in the line of fire if she had finished work minutes earlier. "There's a lot of people sharing that feeling ... I was about 20 metres from where Elliot lived; it's horrible to think there were three people dead in there." Ms Lyons also said her neighbour's friend, was shot 20m from her door in the attack.
The man, who was shot in the scrotum, was a comical guy who was making light of his injuries, Ms Lyons said.
The weather had been overcast and cold. There were still a lot of police around and the mood was sombre.
On Sunday, Ms Lyons attended a candlelit vigil at the University of California campus commemorating the victims.