The FBI and the Texas Rangers joined the investigation into the McLellands' deaths.
McLelland and his wife, Cynthia, 65, were the parents of two daughters and three sons. One son is a police officer in Dallas. The couple had moved into the home a few years ago, Rozell said.
"Real friendly, became part of our community quickly," Rozell said. "They were a really pleasant, happy couple."
Riccardi reported from Denver. Associated Press writers Michael Graczyk in Houston, Angela K. Brown in Fort Worth and P. Solomon Banda in Denver contributed to this report.
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