Complex sentence: Around this time, Carly was presumed dead after driving her car off a cliff, and Bobbie remained in denial until a body believed to be that of Carly was found in the harbor.
Split into simpler sentences: Around this time, Carly was presumed dead after driving her car off of a cliff. Bobbie was devastated and was in denial over the situation... until a body believed to have been Carly's was found in the harbor.