"Even Bhutto, despite her email pointing a finger at Musharraf, probably did not believe that Musharraf wanted her dead — only that some people around him did," he wrote.
Musharraf's supporters have described the Bhutto case and others against him as politically motivated.
"These are all fabricated cases. There is nothing solid in all these cases," said Afshan Adil, a member of Musharraf's legal team.
The Bhutto case marks the second time Musharraf has been charged with a crime since he returned to the country from years in self-imposed exile in March, said one of his lawyers, Ilyas Siddiqui.
An anti-terrorism court indicted Musharraf on June 15 on the charge of illegally detaining judges following the declaration of a state of emergency in November 2007. Critics said at the time that he was concerned the judges would challenge his recent re-election as president, but Musharraf has denied the allegations.
Musharraf returned from the brief hearing Tuesday to his plush suburban house in Islamabad where he is under house arrest in another case.
He became president a few months before the Sept. 11 attacks and U.S.-led invasion of neighboring Afghanistan propelled him into the international spotlight as a U.S. ally and foe of Islamic militancy.
After stepping down as president he retired into safe exile, and many were puzzled by his decision to come back to legal problems and unpopularity.
He vowed to take part in the May elections but was disqualified — for life — and his legal problems snowballed. He has little popular support in Pakistan and even the military was believed not to want him back.
The charges against him put the military and newly elected Prime Minister Nawaz Sharif in a delicate position. Pakistan has undergone three coups since the country's inception in 1947, one of which aborted Sharif's previous premiership and brought Musharraf to power.
The military is considered the country's most powerful institution. So the prospect of Musharraf as a normal defendant who might end up in prison with many of the people arrested by his government likely does not sit well with a military that prides itself on protecting its soldiers and officers.
"The army will view it with some concern but they will stay quiet for the time being and see how things proceed and to what extent not only Musharraf but the institution as a whole gets dragged in," said Rizvi, the analyst.
The case is also part of a strange reversal of fates for Sharif and Musharraf.
Sharif must tread carefully with the man who once put him in handcuffs. Pushing aggressively for Musharraf's conviction could force a confrontation with the military that Sharif doesn't need right now.
Associated Press writer Munir Ahmed in Islamabad contributed to this report.
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