A Florida teenager faces a charge of elder abuse alleging he made his senile grandmother wear a black mask and hold a handgun for a video he made.

Police in Lake Worth, Fla., say the 85-year-old woman is seen and heard on the video threatening to shoot "all the pigs."

Authorities say 18-year-old Michael Alfinez was arrested Monday and charged with abusing an elderly person, discharging a firearm in public and improper exhibition of a dangerous weapon.

Palm Beach County sheriff's detectives seized the video during a traffic stop in January.

The teen's mother says it's all just a misunderstanding.