DURANGO, Colo. (AP/CBS4) – Investigators looking for a boy last seen in the Vallecito area on Nov. 19 say they hope to talk to a man seen in the north end of Vallecito that day.

La Plata County sheriff’s officials said Monday the man might not realize he could be a potential witness who could help find Dylan Redwine.

READ MORE: Denver Cops File For Injunction To Stop Mandatory Vaccines

Investigators say they recently interviewed someone who remembered speaking to the man, who asked where to find gasoline for his vehicle Nov. 19.

“They’re still following up on tips that come in as they did over the weekend,” Dan Bender with the La Plata County Sheriff’s Office said. “It is frustrating, however, that we’re not getting any information that’s leading us to Dylan.”

READ MORE: Large Fire Erupts At Westminster Apartment Building; Federal Blvd. Partially Closed

The man said he was looking at rental properties. He is described as Hispanic, between ages 45 and 50, about 5-feet-10-inches tall, and about 170 pounds.

Dylan Redwine, in images from surveillance video at the Durango Airport, right, and in a Durango Walmart on the day before he disappeared. (credit: La Plata County Sheriff)

Dylan Redwine, in images from surveillance video at the Durango Airport, right, and in a Durango Walmart on the day before he disappeared. (credit: La Plata County Sheriff)

“It’s an example of how anyone may have information on the case and not realize the significance of it,” Bender said.

Dylan’s 14th birthday was last week. He lives in the Monument area with his mother but was visiting his dad in southwest Colorado in November.

MORE NEWS: Wongel Estifanos Died Due To 'Multiple Operator Errors' On Glenwood Caverns Adventure Park Ride

(TM and © Copyright 2013 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2012 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)