Did someone help the killer boyfriend?

Did he have help in the cover-up? According to the police, the double murder of Kylee Monteiro and her unborn child remain an “active investigation. ”   What is Greg saying?  How was he able to dig a five-foot hole so fast? Nobody saw him on his property killing Kylee, and digging a hole? Where were the grandparents? Were his friends aware? Who was covering for him?