On April 3, 1981, Simmons was being investigated by the Cloudcroft, New Mexico, Department of Human Services for allegations that he had fathered a child with his 17-year-old daughter, Sheila, whom he had been sexually abusing. Fearing arrest, Simmons fled New Mexico in late 1981 with his family, first to Ward, Arkansas, in Lonoke County, and then to Dover, Arkansas, in Pope County in the summer of 1983. The family took up residence on a 13-acre tract of land 6.5 miles north of Dover that would become known as Mockingbird Hill. The residence was constructed of two older-model mobile homes joined to form one large home, neither of which had a telephone nor indoor plumbing, and was surrounded by a makeshift privacy fence which was as high as 10-feet tall in some places.