A friend recently had a reading and the psychic told her she's going to be in a car accident. She asked if she could stop it and he said "no, you can only put it off but it will eventually happen." However, another psychic had told her we have control. I believe that we have free will, which can change the course of events, but don't believe we can change everything.

I wish he hadn't told her, because now she's constantly worried about it.

I also wish this psychic had not told your friend that this was unavoidable!
I really feel like that was wrong for him to do.
There is very very few things that are actually fated.
And they are rare!!!!
What has happened here is that by telling your friend this he has actually planted the seed of a self-fullfilling prophecy into your friends mind.
This may have not been what he intended.
It could be just because of a lack of understanding on his part of cause and effect.
Most likely since he has planted this negative fear into her mind she will most likely have an accident now.
She would have to have an equally powerfully positive seed planted to overcome this.
Yes...she does have freewill and therefore can prevent this accident from occurring.
But it is harder to do with that fear already planted in her mind.
If he had told her from the beginning that she could change the outcome she would have easily avoided this problem.
In my oponion the psychic blew it.
Send your friend the white light of protection meditation from the meditation part of my website for her to use to protect her from any possible accident.
Also she may burn a white candle and ask for protection .
I myself ask for protection everytime I get into a car ...I say a little prayer.
Comfrey is also a good herb to carry apon one's person for protection while traveling.
This I also carry.
I believe if your friend takes some postive steps towards reclaiming her personal power
and believes in her and the Divine's ablity to protect her she can and will avoid this accident completely and forever.
Because it was not pre-destined to happen there was only the possibility.

("And any psychic out there that should disagree with me on this......you need to rethink this .....its not your place to play God with other peoples life's.And NO psychic is 100% right no matter what they say! Not even me.
So never never say that it is for sure that something bad is going to happen to someone because you could actually be the reason that something bad happened to them.
And I don't think you would want that on your Karma! Do You ? ")

Hope this helps
Love & Light Eternally
Deborah Anna