MATTHEWS, N.C. -- Two twin girls were stabbed to death Friday at their home on Creek Pointe Drive, police said. The father of the 5-year-olds, David Lauren Crespi, [has been charged with murdering them. Medic reported that Crespi, 45, called 911 at 12:45 p.m., saying he fatally stabbed his daughters. He also threatened to kill himself, Medic said. When police arrived at the scene, Crespi was waiting for them outside the home. The children were inside, and there was nothing paramedics could do to save them. Officials couldn’t come up with an immediate explanation. “We’re not anywhere where we can...