Neighbors in Lisbon recall Brown University attack suspect as quiet, reclusive student

By Duarte Mendonca, CNN Lisbon (CNN) — Former neighbors paint a mixed portrait of Claudio Neves Valente, whose motives remain a mystery more than a week after police say he killed two Brown University students and an MIT professor, portraying a “very bright” but reclusive young man who was estranged from his family and whose