Mohammad Asghar, whom British doctors say is seriously mentally ill, was shot and wounded by a guard at Adiyala jail in Rawalpindi, close to Islamabad, last month.
The 70-year-old was sentenced to death for blasphemy in January for claiming to be a prophet of Islam in a case that has prompted concern from British Prime Minister David Cameron.
The prison guard Mohammad Yousuf had spent more than two weeks guarding Mumtaz Qadri, a senior jail official said.
He said an initial inquiry by a four-member committee found that Qadri had also prepared two other prison officers to hunt down blasphemy convicts in the prison.
"The accused (Yousuf) was deployed outside the cell of Mumtaz Qadri during the incident and he had confessed to taking religious lessons from him," the jail official told AFP on condition of anonymity.
The claims will heighten concerns about staff being radicalised by hardline inmates in Pakistan's ageing and overcrowded prisons.
Qadri, who was Taseer's bodyguard, shot him dead at an Islamabad coffee shop over the politician's call for Pakistan's tough blasphemy laws to be reformed.
Qadri was feted as a hero by a wide section of the public including lawyers, and was even showered with rose petals as he arrived at court for a trial hearing.
The official's account of events was supported by three other prisoners held in the same part of the jail, who said guards regularly took religious instruction from Qadri.
"I was sleeping when I woke to the sound of gunshots and I saw the prison staff grabbing one of their fellows while Asghar was lying on the ground in a pool of blood," an inmate living next to Asghar's cell told AFP.
A second prisoner who saw the attack said a guard appeared in the wing and demanded to know where Asghar was.
"The prison staff usually shout at us and I thought Asghar's family or lawyers must have sent him something, so I didn't pay any attention, but then I heard the first gunshot," the prisoner told AFP.
He said Asghar was trying to hide in the bathroom area of his cell while the gunman was firing at him.
"He was lucky that he reached the bathroom and the other prison staff arrived to grab the assassin, otherwise he would have been killed", he said.
Inmates accused prison officials of giving Qadri special treatment.
"The prison staff don't shout at him, they talk to him with respect and don't make him do the usual work", said one.
In a further sign that some staff had been radicalised, one high-profile murder convict told AFP that a prison guard had been giving him religious lessons a month before the attack.
"He told me to kill the two blasphemy convicts, saying that I have committed too many sins in my life but I can repay them by killing either both or one of them. He had promised to give me a weapon", the prisoner told AFP.
Asghar, diagnosed with paranoid schizophrenia in Britain in 2010, had declared his prophethood in court and included a reference to it on his business card, a government prosecutor said at the time of his trial.
Asghar's family, who have urged the British government to intervene, say the allegations against him stem from a property dispute with one of his tenants.
COMMENTS (17)
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only the characters of these Muslims can allow them to praise a person who killed the person that he was hired to protect.
the Murderer (Qadri) should have been put in solitary confinement from day 1 and those responsible for the safety of the inmates should be arrested and charged for aiding and abetting Murder.
This sick Lunatic who is now playing the Angle of Death on Gods behalf doesn't realize that He and all his Blashmpy Lovers are putting the religion and the country to shame. No wonder the lands are shrinking for the Pakistanis. Who needs enemy when you have people like him living.
We need to address this crazy mullahism
Let us see how our politicians react to this news. This is new Pakistan and fanatic terrorists are gaining more and more power and influence in every department of state. Unless all our political parties and generals take a joint stand against terrorism we are doomed! Too bad we cannot agree on even this single point agenda. Instead of point scoring and providing legitimacy to these terrorists we should show patriotism and just do the right thing.
If the court can sentence a 70 year old man to death for a victimless crime, then its not the man who is mentally ill....
There will be more murders and the killer would live or let loose again. The leaders Police and Judiciary will most likely be punished in the hereafter but not here as long as PML N& PPP take turns.
His execution is long due. Please punish him for his crime against humanity.
One of the few reasons I have left Pakistan forever. This retarded and medieval mindset is prevalent in all layers of society in Pakistan. We Pakistanis are chasing a mirage within the tragic illusion of an Islamic state.
what a shame. This man showed utter disregard for the blasphemy law by taking law into his own hands, but he has become a hero for many. Somebody needs to show some spine to deal with extremists like him, but unfortunately, nobody, who matters, is clean.
This nut case and other nut cases like him should be hanged immediatly before they poison other retards. Shame on my country.
Shame on our judicial system for not having the courage to punish a murderer.
He is a murderer and keeping him away from Justice is the reason for new injustices to be born. He should immediaetly be brought to Justice.
Conspiracy to commit murder is a crime in most of the World - put this thug back on trial and then put him in solitary confinement or execute him.
Price of indecisiveness is too high.............. only if these political "leaders" knew better and acted on death sentences which are pending
What a shame. One rotten apple that should have been dealt with is spoiling ohers. Where is the inciting violence clause now?
A hero always inspires others to follow his footsteps..... he was showered with rose petals and hailed by the very people who are suppose to punish criminals.