Complex sentence: Cole was a familiar face to Carol and Reggie Sumner, having been a neighbor of the 61-year-old couple when they lived in South Carolina, and had bought a car from them at the time the Sumners moved to Florida in March 2005.
Split into simpler sentences: Cole was a familiar face to Carol and Reggie Sumner, having been a neighbor of the 61-year-old couple when they lived in South Carolina. Also, Cole had bought a car from them at the time the Sumners moved to Florida in March 2005.