Whether people in his government made it easier for the assassination to happen or not, General Musharraf is now in a very tight spot, IMHO. Unless he acts decisively and convincingly, he’ll look like the guy who had the most to gain from Bhutto’s death.
As someone said in an earlier comment, this is a win-win situation for extremists, who weaken the government and decapitate the only viable alternative there ever was in one fell swoop.
FWIW, On 27 January 2007 she was invited by the United States to speak to President Bush and congressional and State Department officials. President Pervez Musharraf gave up his uniform on November 27, 2007, and then was sworn in as a civilian president. 30 days later, Bhutto is assassinated.
Not the only attempt on her life as a coordinated attack in recent history. From http://www.answers.com/topic/benazir-bhutto#wp-_note-32 is the following excerpt:
After eight years in exile in Dubai and London, Bhutto returned to Karachi on 18 October 2007 to prepare for the 2008 national elections.[55][56]
Main article: 2007 Karachi bombing
En route to a rally in Karachi on 18 October 2007, two explosions occurred shortly after Bhutto had landed and left Jinnah International Airport. She was not injured but the explosions, later found to be a suicide-bomb attack, killed 136 people and injured at least 450. The dead included at least 50 of the security guards from her Pakistan Peoples Party who had formed a human chain around her truck to keep potential bombers away, as well as 6 police officers. A number of senior officials were injured. Bhutto was escorted unharmed from the scene.[57]
Bhutto later claimed that she had warned the Pakistani government that suicide bomb squads would target her upon her return to Pakistan and that the government had failed to act. She was careful not to blame Pervez Musharraf for the attacks, accusing instead “certain individuals [within the government] who abuse their positions, who abuse their powers” to advance the cause of Islamic militants. Shortly after the attempt on her life, Bhutto wrote a letter Musharraf naming four persons whom she suspected of carrying out the attack. Those named included Chaudhry Pervaiz Elahi, a rival PML-Q politician and chief minister of Pakistan’s Punjab province, Hamid Gul, former director of the Inter-Services Intelligence, and Ijaz Shah, the director general of the Intelligence Bureau, another of the country’s intelligence agencies. All those named are close associates of General Musharraf. Bhutto has a long history of accusing parts of the government, particularly Pakistan’s premier military intelligence agencies, of working against her and her party because they oppose her liberal, secular agenda. Benazir claimed that the ISI has for decades backed militant Islamic groups in Kashmir and in Afghanistan.[58]
There are discrepancies between the accounts published in western newspapers, Pakistani tabloids, and eye witness accounts of the assassination attempt. Benazir’s husband categorically refused to accept that the suicide bombing was an attack by Al Qaeda or the Taliban. Correspondingly, Pakistani Taliban leader Mehsud denied responsibility and Jamaat Islami, an opponent of Bhutto, announced a three days mourning period for the dead, thus lending credibility to Bhutto’s claims that the attack was engineered by close associates in the government of General Musharraf.[citation needed]
Benazir’s associates describe an initial small grenade attack, followed twenty seconds later by larger explosives, one right and and one left of the truck carrying Benazir; this was followed by a brief burst of gun fire directed at vehicle’s roof. The PPP sources claim that yet another non-exploded bomb was fixed on a bridge which the vehicle had already crossed[citation needed].
Some witnesses report there was a sizzling sound, apparently an underground wire signal for the explosive devices. Benazir escaped, as she was protected by a 30-inch tall bullet-proof lining on the top of truck and was reportedly descending into the vehicle’s interior at the time; hence neither shrapnel nor bullets killed her. She was also protected by a “human cordon” of supporters who had anticipated suicide attacks and formed a chain around her to prevent potential bombers from getting near her. The total number of injured, according to PPP sources, stood at 1000, with at least 160 dead (The New York Times claims 134 dead and about 450 injured). The PPP lodged a complaint and FIR in protest, but was cautious in laying blame.[citation needed]
A few days later, Bhutto’s lawyer Senator Farooq H. Naik said he received a letter threatening to kill his client. The letter also claims to have links with al-Qaeda and followers of Usama bin Laden.