The suspect alleged to be behind the 2010 Independence Day bombing in Abuja, Charles Okah, tried to jump from the third floor of the Federal High Court complex in Abuja on Tuesday.
Okah is standing trial on charges of terrorism at the Federal High Court.
Security operatives prevented him from carrying out the act.
Before attempting to jump from the window, Okah, whose lawyer was absent in court, had requested the permission of the judge to allow him speak.
The judge accepted and permitted him to speak for about five minutes.
He said: “I have been incarcerated for about five years now and I have a family to cater for. My children would grow up without feeling the warmth of their father and I am tired of this endless trial. I really do not know what I have done to be treated this way.
“Is it not better to die than to wait and be messed up this way?”
After his speech ended, he attempted to jump down from the five-storey building but he was pulled back by security operatives, lawyers and other people present in the courtroom.
Okah’s case has now been adjourned to October 20 for continuation of trial.