In 2002, the DA's successor took over investigation of the case from the police and primarily pursued the theory that an intruder had committed the killing. In 2003, trace DNA that was taken from the victim's clothes was found to belong to an unknown male; each of the family's DNA had been excluded from this match. The DA sent the Ramseys a letter of apology in 2008, declaring the family "completely cleared" by the DNA results. Others, including former Boulder police chief Mark Beckner, disagreed with exonerating the Ramseys, characterizing the DNA as a small piece of evidence that was not proven to have any connection to the crime. In February 2009, the Boulder police took the case back from the DA and reopened the investigation.