-- Yesterday's brutal stabbing in Chelsea may have been the culmination of a violent domestic conflict. Eugene Teixeira, 21, was arraigned today on charges that he stabbed his mother's boyfriend Shadeed Wiggins to death. Teixeira's 16-year-old brother also faces charges of home invasion and disorderly conduct after the pair broke into their mother's house in pursuit of Wiggins, 25. According to reports, Wiggins had attacked Janeen Teixeira, the brothers' mother, earlier in the day, part......