Madariaga served long prison sentences and spent years in exile, but severed his links with ETA in 1989 after becoming disillusioned with the group's methods. He left Herri Batasuna in 1995 after the party refused to condemn ETA violence.
In June 2006, he was arrested in France on charges of extorting businessmen into making financial contributions to ETA. However, the charges were dropped and he was released within days.
- "Spanish hold vigils urging Eta not to break terror ceasefire", The Independent, December 4, 1999
- "ETA may call for end to violence". AP, March 25, 2004
- "From Belfast to Bilbao". Guardian, April 19, 2006
- "Spain announces peace talks with ETA". AP, June 29, 2006
- Baskenland Informatie Centrum newsletter, June 2006
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