The Savopoulos family was having a busy week. The husband was trying to get a new martial arts center in Chantilly, Va., ready for a grand opening, and he enlisted the help of one of his housekeepers. His wife was ill, and their 10-year-old son was recovering from injuries suffered in a go-kart crash. The days and hours leading up to the deaths of Savvas and Amy Savopoulos, and two others believed to be their son and another housekeeper, came into sharper focus Saturday with new details from police records. They show attempts by friends and relatives to reach the...