Story highlights A woman tells French radio that she tipped off investigators to the attack ringleader's whereabouts

Her interview with RMC radio reveals details about Abdelhamid Abaaoud and his purported plot

(CNN) Days before he died in a shootout with police, the ringleader of the Paris terror attacks boasted that he'd slipped into France without identification papers -- and that 90 people from different countries did the same, according to a widely cited radio interview.

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France's RMC radio interviewed a woman claiming to be the witness who tipped off investigators to Abdelhamid Abaaoud's whereabouts in the days after the November attacks.

The woman's voice was disguised in the interview, and her identity was not revealed. She told RMC that she was friends with Abaaoud's cousin and met the attack mastermind when they were looking for a place to stay.

The interview, which also aired on CNN affiliate BFMTV, reveals new details about the ringleader and his plan:

• Abaaoud was planning to carry out attacks against a police station and a child care center in the Paris business district of La Defense on November 19, the woman says, citing a conversation she had with his cousin.

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