Qahtan was a faculty member at Sanaa University from 1992 to 2011.
Several hundred students protested outside Sana'a University demanding her release.
He was also a leading economist at the state-owned Sana'a University.
Protests continued as students started a sit-in at Sana'a University.
He earned a bachelor degree in economics with honors at Sana'a University.
At the time, the protests outside Sanaa University were impressive but hardly large enough to threaten the regime.
For weeks, the protesters who have gathered at Sana'a University have been watched by police and soldiers.
He is a political scientist at Sana'a University.
But the demonstrations at Sanaa University kept going.
By the end of February, the crowds outside Sanaa University had grown considerably.