Farabundo Marti National Liberation Front's [FMLN] urban commandos have denied reports they participated in an attack on vice president-elect Francisco Merino's home.
The FLMN denied reports that they did not participate in an attack on vice president-elect Francisco Merino's home. 
I wrote my incorrect statement in a way that was similar to the original correct statement. They way I wrote it would show that they denied innocence