Federal prosecutors want to know if a maker of bulletproof vests put President Bush's life in danger.
A whistle-blower from Second Chance Body Armor of Michigan testified this month that the Secret Service bought some defective vests. Some of those went to the president and first lady.
Transcripts obtained by The Associated Press show the Pentagon has the same armor for elite troops who guard generals.
Documents and testimony show many vests were sold after the company learned that the material in the vests was degrading faster
than expected because of heat, light and moisture. The degrading might allow bullets to penetrate the armor.
A California police officer was shot to death while wearing the vest in 2003.
Memos show Second Chance's research chief asked the company's president unsuccessfully in 2001 to replace the vests.