Keith Papini talks to '20/20' about wife's abduction

REDDING, Calif. -- Keith Papini is giving his first TV interview about his wife Sherri, the Redding mother who survived being abducted for three weeks.

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Keith opened up only to ABC's "20/20," speaking in graphic detail about his wife's account of what she went through and how she was let go 150 miles from home on Thanksgiving Day.

He said when she ran to the freeway for help, drivers kept passing her by.

"She screamed so much, she said she was coughing up blood from the screaming, trying to get someone to stop," he said. "Again, just another sign of how my wife is, she's so wonderful. She says maybe people aren't stopping because I have a chain, it looks like I broke out of prison, so she tried to tuck in her chain under the clothes."

RELATED: Husband releases statement on Sherri Papini disappearance

After two days of intense interviews, detectives say Sherri revealed more about her suspected kidnappers. She said the two women spoke Spanish most of the time and concealed their faces from her.

You can watch the full exclusive interview with Keith Papini on Friday at 10 p.m.