Disability Cornwall today led the calls for Mr Brewer's resignation.
Theresa Court, advice services manager, said:
I remember him (Mr Brewer) coming over and asking what the stall was about.
I was explaining to him about the parent partnership service when he said disabled children should be put down.
He said they cost the council too much money.
I felt physically sick. I was there with parents of disabled children at the time and I just had to turn my back on him.
He is supposed to be an elected member representing public views and acting on behalf of the public.
How anyone can come out with that is just shocking.
More top news
The UN has said it is deeply concerned by reports hundreds of Syrian men have disappeared amid a mass exodus from rebel-held areas.
A man suspected of planning a terrorist attack has been arrested in Rotterdam after police found a loaded AK-47 in his apartment.
Another mild day with highs reaching up to 13C degrees in mild southerly winds