11.   But Slahi was eventually released and disappeared after the U.S. officials decided they lacked sufficient evidence to charge him with a crime and to request his extradition.

12.   But they have lacked sufficient evidence to charge Whirty with the crime.

13.   But they have had trouble convincing people because investigators have conceded that they lack definitive evidence either way.

14.   China maintained it was unaware of any nuclear equipment transfers, and Secretary of State Warren Christopher decided he lacked evidence to contradict the Chinese.

15.   Defense officials, meanwhile, said the search for Osama bin Laden will continue as long as they lack evidence of his demise.

16.   Earlier, a Manhattan grand jury had concluded that it believed Young but lacked corroborating evidence to indict Arroyo and the sergeant, Michael Rodriguez.

17.   Four men were eventually arrested for the attack, but prosecutors dropped the charges in August, saying they lacked sufficient evidence to prosecute.

18.   However, he lacks evidence to raise such a question.

19.   If he lacks such evidence, he should say so.

20.   In addition, officials said, they lacked evidence that could be used in public court proceedings.