Police in Iowa have arrested a murder suspect they believe could solve a cold case in Colorado from nearly 22 years ago. Rosa Arguello’s body was found in October 2003 in Thornton.
Investigators with the Dubuque Police Department arrested Robert McClain, 55, on Monday morning on a warrant out of Adams County for homicide. Detectives said that they had previously received information that McClain may have been involved in a Colorado homicide cold case. They worked with the Thornton Police Department to make the arrest.
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