The family of late NFL standout Aldon Smith is taking a major step to better understand the circumstances surrounding his sudden death, announcing that his brain will be donated to the Boston University CTE Center for examination. The move comes just days after the former San Francisco 49ers star died unexpectedly at age 36. Attorneys representing Smith's family told ABC News that the decision is part of a broader effort to determine what happened to the former All-Pro pass rusher. The family has retained attorneys Harry Daniels, Bakari Sellers, and Wayne Kendall to investigate his death, which remains unexplained publicly. In a statement released on Tuesday, June 16, the legal team said, "As with anyone who dies so suddenly at such a young age, we understand that there is a great deal of interest in and speculation about Aldon Smith's passing and we intend to get to the bottom of it." The attorneys added that one of the first steps in that process involves sending Smith's brain to Boston for testing.…