Saiful Malook had fled to the Netherlands after receiving death threats in Pakistan

Children's guardian, his family also granted asylum in Canada

The case will be heard by a three-member bench headed by Justice Asif Saeed Khosa

Supreme Court sets aside Lahore High Court order to acquit Shah Hussain

Court instructs federal and provincial governments to trace the person responsible for the threatening phone calls

Suspects were accused of kidnapping Muhammad Siddique in 2011

Usman Dar and Khurram Sher Zaman submitted the petitions

Justice Khosa has been part of benches deciding high-profile cases and has authored many landmark judgments

In a career spanning over 19 years, Justice Khosa has decided about 55,000 cases

Justice Khosa says court should shed light on the institution that perpetrates interference