John Ellis, 68, a building manager from Santa Monica, said he overheard Weller say very calmly to a woman who appeared to be an off-duty police officer: "How many people did I hit?"
"It wasn't even a question," said Ellis. "It seemed like more of a statement. He was very calm."
Kahmiim Gufur, who sells sprouts at the market, said he saw a man help Weller out of the car and ask him, "Do you know what's going on? Do you know what you're doing?"
"No," Weller said, according to Gufur.
Butts, the police chief, said that when he arrived at the scene, Weller "was talking and appeared confused." However, asked if Weller was lucid, the chief said, "He was speaking and he was lucid, yes."
One neighbor, Anh Gurfield, said she had lived next door to Weller for 35 years. "I just don't understand," she said. "He always drives very carefully. Very slowly."
After police questioned him, Weller, slightly stooped and using a cane, walked out of Santa Monica police headquarters with a grandson, another family member and an attorney.
Asked to comment, he looked at reporters and said "no" several times.
Later, attorney James Bianco spoke to reporters outside Weller's daughter's home in Santa Monica. "Mr. Weller and his family want to express their deepest sympathies to the victims of the tragic accident earlier today and their families," he said.
"This was an unintentional and unfortunate accident. Mr. Weller is very shaken up, but his thoughts are with the victims and their families tonight."