Live from ABC News headquarters in New York City, this is Good Morning America.

We're going to begin with the search for Nancy Guthrie.

Investigators combing the area along the road near to 84-year-old's home as thousands of tips are pouring in after the release of the doorbell camera video for the night of her abduction.

Chief investigative correspondent, Aaron Kuturski, is in Tucson with the

latest. Good morning, Aaron. Good morning to you, Michael. It is 12 days since Nancy Guthrie was last

seen here at home and a full week now since investigators have publicly discussed the case.

There have been some promising images and a whole lot of tips, but no suspect and no sign of Nancy.

This morning, the search for Nancy Guthrie expands through the Catalita foothills where investigators are combing through roadside brush, drainage basins, and neighboring properties.

A local television station quoted the sheriff saying they found two black gloves that are now being tested to see if there's a connection to the figure wearing gloves on Nancy Guthrie's doorstep.

The Pima County Sheriff's Department said it has received 18,000 tips since Guthrie was abducted in the dark of night Sunday, February 1st, and there was a new influx of calls after the FBI released those doorbell camera images, also

showing the suspect in a mask, carrying a backpack and appearing to holster a gun.

Another break in the case fizzled after authorities released this delivery man they had detained

for questioning.

Law enforcement sources told ABC News the man who identified himself as Carlos was detained in Rio Rico near the Mexican border after the FBI used a series of digital techniques including cell phone usage information and traffic data.

Authorities obtained a warrant from a local judge to search his home.

After several hours of questioning, he was released without charge, and Carlos told reporters he

had nothing to do with the abduction.

I mean, I hope they get the suspect, because I'm not it.

They better do their job and find the suspect that did it so they can clear my name.

I'm done.

Just look at what I'm putting my family through.

Investigators are now analyzing every pixel of the doorbell camera footage for identifiable features, including the man's clothing and potential weapon.

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