The House That Held Secrets

From the time the house was built the rumors started. Everyone in town knew that this house kept secrets. There was the murder and disappearance of an entire family, the Lansing's. Alvin Lansing and his son, Bobby Joe were both found dead. His wife, Alice Jean, and daughter were assumed missing.
When Dr. Shepard and his family moved in, he discovered that the house's past would come back to haunt him and them. Shortly after they acquired the house someone tried to make them believe that it was haunted, but Dr. Shepard didn't believe in ghosts. The strange things that were happening around them had to have another explanation.
Dr. Shepard met and married a wonderful woman, Sarah Carson. Sarah and her son, Lucas, joined the Shepard family. Shortly after they moved in more unexplained things began to happen.
It was rumored that Amanda Lansing had come back to haunt the house. The question was, did she?
When Dr. Shepard's daughter is kidnapped what truly was happening in the house would be revealed.
Was there a ghost, or some other evil that was haunting them, something more sinister?