1 of 2 | Nancy Guthrie was last seen Jan. 31 around 9:45 p.m. and was reported missing after failing to show up for church the next day. File Photo courtesy Pima County Sheriff's Department

July 30 (UPI) -- Pima County Sheriff Chris Nanos released a statement Thursday marking six months since the disappearance of Nancy Guthrie, the mother of Today Show host Savannah Guthrie.

The Pima County Sheriff's Department said in a social media post accompanying the statement that the investigation remains active and ongoing.

"A task force of investigators from the Pima County Sheriff's Department and the FBI remains committed to finding Nancy and providing answers to her family," Nanos wrote. "The analysis of DNA and digital evidence has been underway for the past six months. This work is complex and time-intensive, but investigators continue to pursue every credible lead."

In an interview on the YouTube channel The Sharpe Exchange, Nanos said he believes "every day we're closer" to identifying a suspect or suspects.