GARBLE

to distort or slur

make false by mutilation or addition

SYN - distort, falsify, warp

"He purposely garbled what had been said so that it sounded as if I had supported the cause."

"she would garble the speech before the president went on so that its meaning would be unclear and contradictory."

"The picture had been garbled by the addition of a colored screen."

"By the time the cops arrived somone had already garbled their one good piece of evidence."