Major Nidal Hasan, who has been charged with 13 murders over the shootings at Fort Hood in Texas, is paralysed from the neck down, says his lawyer.
Intelligence agencies learned an Army psychiatrist contacted an Islamist sympathetic to al-Qaeda and that the information was relayed to authorities.
Investigations into the shooting at Fort Hood that left 13 people dead are continuing to focus on the internet activities of the alleged shooter.
The carnage at Fort Hood military base, where a Muslim army doctor is accused of killing 13 people in a shooting spree, was a ticking time-bomb.
Major Nidal Malik Hasan, a US army psychiatrist, is in hospital under military guard after going on a shooting rampage at a military base in Texas.
A US army psychiatrist about to be deployed to Afghanistan allegedly shouted "Allahu Akbar", or "God is greatest", as he opened fire.
