Diddy Requests Mistrial Again, Says Prosecutors Knew Testimony Was False

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Diddy 's asking the judge in his case for a mistrial again ... accusing prosecutors of presenting testimony they knew -- or should've known -- was false.

The rapper and mogul's legal team filed the letter Saturday morning ... and, the reasons for their request are related to testimony about the alleged incident where Bryana Bongolan -- a friend of Cassie 's and fashion designer -- says Diddy held her over the edge of a balcony , 17 stories in the air. X / @BanaBongolan

Diddy's lawyers say prosecutors presented untrue testimony when Cassie testified about the incident because she said she actually saw Diddy holding Bryana over the balcony's edge.

However, texts from Cassie to Kristina Khorram -- one of Diddy's employees often called his chief of staff -- in