Federal investigators who raided Kenilworth Science & Technology Charter School in Baton Rouge last month are scrutinizing the school's dealings with several businesses, including vendors who have provided services such as busing and cleaning.

The authorities targeted financial records relating to nine companies, most of which are owned by individuals of Turkish descent, according to a search warrant, and confiscated reams of other documents before copying the hard drives of computers in the school's business office.

While many questions remain unanswered, the warrant offers the most detailed glimpse to date of what the FBI was seeking Dec. 11 when agents dropped in on the school unannounced.

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