Smith apologized and announced that he would get help. In the meantime, he will sit out Thursday night's game at St. Louis. 49ers CEO Jed York said that he may sit out longer than that, depending on his treatment.
"First off, I wanted to apologize to the team, the organization, my family and everybody I let down," Smith said. "I also wanted to let it be known that this is a problem and it's something that I will get fixed, and that I'll do everything in my power to make sure that this never happens again.
"I also wanted to let everybody know that once again I'm sorry."
Smith was arrested and jailed Friday morning at 7 a.m. after an accident in which he ran his truck into a tree. He played in the loss to the Colts Sunday, though, and York defended the decision to keep him in.
"Our opinion is if you're sitting someone down and paying them to sit down when they're going to seek treatment in the future, we didn't feel like that was an appropriate punishment," York said.
"We're not trying to circumvent what the NFL will do. This is about making sure that Aldon has the opportunity to work on something, to get better, and he knows that he has our support and hopefully he has everybody's support in something that is going to be very difficult."
There is no timetable in place for Smith to get treatment, but York defended him as the process begins.
"It was disappointing, but we support him, and knowing that what he wants to do is not a one-day fix, it's a long-term fix for Aldon," York said.
"Aldon is willing to fight for himself and try to make this right, and I will see it through, and I will support him. I will take any shots that anybody wants to direct at the organization. They can direct at me, and I will support Aldon as long as he is willing to work at this and fight to get better."