Introduction from Maureen Wallace,  rookie mom of a child with Down syndrome   At least once a day since Robert “Ethan” Saylor died in January, I have thought about how my son, Charlie, could face a similar fate. Charlie has Down syndrome, just like Ethan. Many other parents of children with Down syndrome have written eloquently, scorchingly and fervently since Ethan died (the International Alliance of Writers for Down syndrome provides a great round-up of blog posts, essays and articles). While some of us may disagree on the best way to move forward from the tragedy, we all agree an independent investigation is the only way we can begin to move forward. It’s the only way to stop the constant wondering, each day, what could…