Deliveryman Declares Innocence After Being Questioned, Released in Nancy Guthrie Kidnapping

The DoorDash deliveryman released Tuesday night after the FBI detained and questioned him in connection with Nancy Guthrie's abduction is speaking out ... telling the world he's not the kidnapper!

The deliveryman, named Carlos, told a scrum of reporters he didn't know who Nancy was until he came face-to-face with FBI agents and Pima County sheriff deputies in Rio Rico, Arizona ... about 60 miles south of Tucson.

Carlos told journalists he noticed law enforcement following his vehicle Tuesday evening as he drove down a road in Rio Rico near his home, pulling over on his own accord.

The deliveryman -- who works for DoorDash and GLS -- says the authorities promptly detained him and questioned him for hours about his recent whereabouts. But Carlos insists he's totally innocent and has nothing to do with Guthrie's abduction ... saying he feels like he was kidnapped himself.

He also slammed the police for breaking down his front door and damaging the garage door of his house when they raided it earlier in the day. Bottom line ... Carlos wants to clear his name.

After Carlos was detained, his mother-in-law also spoke with reporters, saying the police raided their home after receiving a tip that Nancy was in their home. The mother-in-law seemed genuinely confused as to who Nancy is ... and said she allowed authorities to search her home, but they came up empty.

The Pima County Sheriff's Department confirmed they conducted a court-authorized search at Carlos' residence, about 15 miles from the Port of Nogales, a major U.S.-Mexico border crossing.

Earlier Tuesday, the FBI released images and a video of Nancy's alleged kidnapper ... showing the masked intruder at her front door on a NEST camera.