Just adding some context:
This is a 19,000 mile road, goes from Alaska to Argentina.
The protests are causing $80M/day losses to business and shuttered schools across the country for a week. 
The shooter is 77, a lawyer and a professor.

A 77-year-old man shot dead two environmental protesters on Wednesday in an apparent outburst of rage over a roadblock in Panama.

The gunman was named in local media as Kenneth Franklin Darlington Salas. If he is convicted, Mr Salas could be sentenced to house arrest rather than being sent to jail because of his age.

The protesters, who were opposed to a controversial mining contract, had blocked the Pan-American Highway in Chame, 51 miles from the capital Panama City.

Footage posted on social media showed the motorist walking from his car, demanding the protesters get out of the road.

Initially, Mr Salas removed tyres which were obstructing the road. The protesters, according to witnesses, shouted at the man: “Are you going to kill someone?”

The gunman replied: “You want to be the first?”

He opened fire, first shooting a protester holding a flag and then a second man who went to confront him, before walking off and removing tree trunks that had been blocking the road. He was then arrested.

Local media identified the victims as Abdiel Diaz, a teacher and union activist, and Ivan Mendoza.

The deaths are the first fatalities in protests that broke out on October 20 against a contract that allows Canada-based First Quantum Minerals to operate Central America’s biggest open pit copper mine for at least another 20 years.

Jim Gordon : What about escalation?

Batman : Escalation?

Jim Gordon : We start carrying semi-automatics, they buy automatics. We start wearing Kevlar, they buy armor piercing rounds.

It's good to teach them a lesson.

But why not aim for the limbs? I mean, isn't it too much for killing them?

cukur jadi lauya you know the law so even if you shoot to death 2 ppl can still get away   

Man... looks like santa claus on a bad day.

spoiler: ppl kena shot

The protesters, according to witnesses, shouted at the man: “Are you going to kill someone?”

The gunman replied: “You want to be the first?”