81.   A material witness warrant allows authorities to hold someone considered crucial to the investigation without charging him with any crime.

82.   A material witness is someone considered crucial to an investigation who can be held without being charged with any crime.

83.   A material witness is someone considered crucial to the investigation who may be held without being charged with a crime.

84.   A material witness is someone considered crucial to the investigation whom authorities may detain without charging with any crime.

85.   A Savimbi-dos Santos meeting is considered crucial to any chances for the treaty to hold.

86.   A material witness is held, but not charged, because he is considered crucial to an investigation.

87.   A stable truce in Bosnia is considered crucial to the peace talks.

88.   A stable cease-fire is considered crucial to foster the U.S. talks, which are aimed at working out the difficult details.

89.   A stable truce is considered crucial to the forthcoming U.S. talks.

90.   A stable truce is considered crucial to the U.S. talks, where the warring side must work out the details.