Buffalo (AFP) – The white teen accused of murdering 10 Black people at a New York grocery store planned the shooting for months — and scoped out the location ahead of time, social media posts attributed to the suspect show. Payton Gendron, 18, visited the Tops Friendly Market in Buffalo three times on March 8, and wrote afterwards of his intention to commit murder — according to posts he is believed to have made on Discord and 4chan, both sites popular with radicals. He wrote about how many Black and white shoppers were inside and mapped out the supermarket’s aisles, CNN and The Washington P…