Wednesday, following an autopsy, police said that the death of Diana Alejandra Keel was treated as a murder.
On Tuesday the police interrogated Keel's husband, Rexford, Major Miste Strickland of Nash County Sheriff's Office. At the time, he had not been charged with his wife's death and was released.
Police now say they don't know where Rexford Keel is, but a 1998 Chevy pickup, possibly in pewter or gold, may be in service with the North Carolina BBM-9232 license plates.
Even the first wife of a suspect investigated
Investigators are also taking a second look at the death of Keel's first wife, Elizabeth Edward Keel, who died in 2006 in the same house where Keel lives today, according to a statement from the sheriff's office.
The 2006 death had been conditioned by an incident in the coroner's office, said the Nash County Sheriff's Office. An autopsy indicated that she died after falling and hit her forehead at the corner of concrete steps in front of the house. Strickland told CNN that the detectives were collaborating with the FBI and other local agencies to investigate the deaths of both women.