E60 Qatar's World Cup (2:16)

E60 went to investigate the plight of migrant workers. They went back to see how things have changed over the last eight years. 2 minutes later.

The son of a World Cup stadium construction worker said his father warned of poor working conditions before he died of heatstroke.

Mosharraf Hossen was "suffering to survive" in an interview with his son, Abdus, as part of the E60 documentary "Qatar's World Cup" The plight of migrant workers is detailed in the report.

"He thought about the happiness and future of his family and went there with a hope of a better income." He said after he got the job that they weren't paying him enough. I am not happy to be alive.

6:30 p.m.

The heat can reach 120 degrees. The day after the temperature reached 115 degrees, Hossen passed away.

The only thing he said was that there was too much suffering in the country. The daughter of Hossen said that he couldn't handle the heat. He was a hard worker. He didn't let us feel the pain.

The death certificate shows Hossen died of a heart attack. The family got $2,500 in back pay from his employer, but not from the government.

We do not believe that the reason was heart attack or stroke. They don't want us to know how he ended up dead.

The country of 300,000 has faced intense scrutiny over its treatment of migrant workers and other human rights issues since being awarded hosting rights to the tournament over a decade ago. The cost to host the tournament is said to be more than 200 billion dollars.

There have been 15,000 deaths of foreigners in the country since 2010, but only 39 of them were related to work. The deaths were not caused by heat. Reports state that there could be as many as 6,500 deaths among migrant workers.

Mohammed al-Obaidly said there have been cases in which compensation and payments have been made. The minimum wage was raised to $275 a month and a $150 million fund was established to settle pay disputes.

According to Al-Obaidly, this is the right minimum for living in the country.

The country will be criticized from outside groups over its labor conditions, according to Al- Obaidly.

The World Cup is a stage that will end in December, but our laws are still being developed and we don't implement them only for the World Cup.

"To look after us, to stand beside us, that's what I want from the government of the country that my father died in," she said.

All we had was my dad. We are in a lot of pain because of that.