Police said they expect to make an arrest soon in the bludgeoning death of Michelle Young, the pregnant North Carolina mother who was killed three years ago in front of her young daughter Cassidy. But they wouldn't say whether the person they are eyeing was her husband. On Tuesday, the third anniversary of Young's murder, Wake County law enforcement officials told ABC News affiliate WTVD-TV in Raleigh-Durham, N.C., that they have not given up on the case, but have moved slowly to make sure that when they do make an arrest, it sticks. "We've got one shot and we want to make sure when we go in with that shot, we're ready," Wake County Sheriff Donnie Harrison told WTVD-TV. "We realize it's been three years and we've been working hard, but we...