Nothemba Kabane said her husband Nozulu, a tobacco worker, had been warned to be cautious in his criticism of Poqo shortly before he disappeared in October 1962.
"My husband did not like the killing of people. There were a lot of people killed by Poqo. He used to stand on a chair in a bar and speak out against Poqo."
Two weeks after a failed arson attack on their home, her husband disappeared after leaving the house in the company of three friends, she said.
Several days later police asked her if she knew where he was. A resident had already told her a headless body had been found in bushes in the Wellington area.
She said police brought her the clothes her husband had been wearing on the day he disappeared. She was asked to identify his head, which had been hacked from his body.
"I was afraid. It was the first time I had seen a man headless like a sheep."
According to Truth Commission researchers, seven people suspected of being police informers were killed by Poqo members between January and November 1962.
"I would like the Truth Commission to investigate the tragic death of my husband and help me to pay my housing bond because I am now on my own and struggling to make ends meet," Kabane said.
Earlier on Monday, the commission heard the testimony of Phathekile Hans, whose brother, a Poqo acivist, was hanged in 1967 for allegedly trying to overthrow the government.
Hans said his brother Gqibile was a prominent member of the Pan Africanist Congress and was deeply involved in the activities of Poqo, which began a sabotage campaign soon after its establishment in 1961.
Gqibile and six others were arrested by police on the eve of a planned attack on the Paarl police station on November 22 1962.
On the day of the attack police intercepted a group armed with axes, pangas, sticks and sabres and opened fire on them. Three were shot dead in front of the police station.
After regrouping the group attacked houses in a white residential area, killing two whites, including a 17-year-old girl.
Hans said his brother was jailed for three years and waas sent to Robben Island for his part in organising the attack.
In 1966 his brother was transferred to Pollsmoor Prison on the mainland and went on trial for attempting to overthrow the government.
He was hanged in June 1967 while his mother and wife looked on.
"Is it correct for a person to be sentenced to death just for being a leader in an organisation without him having committed a murder?" Hans asked.
Human rights violations committee member Pumla Gobodo-Madikizela said commission investigators had been unable to get access to court files relating to his brother's case. Sapa