Members of an immigration-reform group formed in the wake of 9/11 came to Brewster yesterday to decry the recent deaths of a mother and daughter who police say were killed by an illegal immigrant driving drunk. Members of 9/11 Families for a Secure America called for tougher enforcement of immigration laws in the wake of the June 8 deaths of Lori Donohue, 37, and her daughter, Kayla, 8. The two were struck, police said, by a truck driven by Zacaria Conses-Garcia as they were leaving the girl's dance class.