So, an illegal throwing a 4 ounce (113 grams) rock at 80 mph (35.7632 meters/sec) has the following kinetic energy.
KE = 0.5 x mass x velocity^2
KE = 0.5 x 113 grams x 35.76 meters/second
KE = 2,020.44 Joules
Border patrol responds with a 9mm 125 grain bullet (7.45187465 grams), fired at 490 meters/second
KE = 0.5 x 7.45 grams x 490 meters/second
KE = 1,825.25 Joules
The law enforcement’s energy expended in his response was LESS than the energy expended in attacking him, and his dog.
Check your units (use kg, not g), and don’t forget to square the velocities...
Rock - 72.3 joules
Bullet - 894.3 joules
Having said that - you are right, as I read the article... If he threw more than a dozen rocks, if you add them together, they have more energy than 1 bullet... Didn’t think about that.