My friend is charged with aggravated assault against a police officer in Texas. According to the definition of aggravated assault, either serious injury or deadly weapon needs to be used for this crime. And even for simple assault, bodily injury is required. However, from the police report, the cop only mentioned during the arrest, his face got hit by my friend and cause pain.
Therefore, can they charge my friend with the crime which doesn't match what has been reported in police report ? If not, will they reduce this charge or dismiss it ?

Thanks,

Peter