Musharraf charged with treason

The BBC has an article by Shumaila Jaffrey about Pakistan:

A court in Pakistan has charged former military ruler Pervez Musharraf (photo) with treason, the first army chief to face such a prosecution. Musharraf is accused of unlawfully suspending the constitution and instituting emergency rule in 2007. He pleaded not guilty, and has always claimed that the charges against him are politically motivated. He could face the death penalty if convicted. President from 2001 to 2008, he was one of Pakistan's longest-serving rulers.
Pervez Musharraf was surrounded by military commandos when he entered the court room. He tried to put on a brave face, waving to those gathered in the courtroom. As the charges were read out to him, Musharraf stood up, looking grim and pale. But, when he began his address to the court he was firm and confident. He denied all the charges and spoke of his achievements: the economic development during his rule and his services for Pakistan's military. And then he asked how he could possibly be called a traitor. Security was tight, as expected. There were more than a hundred security personnel in the court room, and the building was also surrounded by troops.
He went into self-imposed exile in 2008, returning to Pakistan in March of 2013. He had hoped to lead his party into elections, but was disqualified from standing and found himself fighting an array of charges relating to his time in power.
The seventy-year-old has been in hospital since the beginning of the year and reports say he is being treated for high blood pressure.
The judge read out five charges to Musharraf. He pleaded "not guilty" to each of them, but also addressed the court with a speech about his services to the country and questioned how he could be called a traitor, declaring that he was a patriot. "I am being called a traitor, I have been chief of army staff for nine years, and I have served this army for 45 years. I have fought two wars and it is 'treason'?" the Agence France-Presse news agency quoted him as saying.
Supporters of Musharraf staged a rally in Karachi, Pakistan, demanding a fair trial for him "Is this the way to reward someone for being loyal to the country and for loving the country?" the former president asked the court.
Since Pervez Musharraf's return to Pakistan in March of 2013, he has faced four criminal cases but was bailed in all of them. He was charged:

In connection with the 2006 killing of a rebel Baloch politician, Akbar Bugti
In connection with the 2007 assassination of former Prime Minister Benazir Bhutto
For putting nearly sixty senior judges under house arrest in November of 2007
Although he was not formally charged, he is on bail in connection with the killing of a cleric in the 2007 Red Mosque siege in Islamabad
His most serious challenge is a treason case, which bears five charges, including suspending the constitution and imposing emergency rule. He pled not guilty, but could face death if convicted.

Musharraf insists that he acted within the constitution when he declared a state of emergency in the country in 2007, and that he did not act alone when taking that decision.
When the former president entered the court he was heavily guarded, but nevertheless appeared relaxed, even waving to the audience. The court has adjourned and its next task is to decide whether Musharraf will be allowed to leave the country to visit his sick mother in Dubai. He is currently on the exit control list which restricts certain Pakistani nationals from leaving the country, and is under house arrest.
Musharraf seized power from Sharif in a coup in 1999. He remained president until 2008, when a democratically elected government came into power. He left the country soon afterwards to live in self-imposed exile in Dubai and London.

Rico says everyone's always getting charged with high treason; is there low treason? (And, if they let him out, how are they gonna get him back?)