LAKE WORTH, Fla. —  An 18-year-old man is charged with elder abuse for having his senile grandmother wear a black mask and hold a handgun for a video on thug life in Palm Beach County, authorities said.

The 85-year-old woman is seen and heard on the video threatening to shoot "all the pigs," referring to police.

Michael Alfinez was arrested Monday and charged with abusing an elderly person, discharging a firearm in public and improper exhibition of a dangerous weapon. Alfinez also appears on the video firing a gun from a moving vehicle, officials said.

Click here to see a portion of the video at FOX affiliate WSVN.com.

Palm Beach County sheriff's detectives seized the video during a traffic stop in January. Court records do not list an attorney for Alfinez. His mother, Michelle, calls the incident a misunderstanding.