The typical protocol is for the Pope, often through the Secretary of State, to send a telegram on the death of a churchman, or on the occasion of another significant event. In the case of cardinals, a pope sends a more personal message. Pope Benedict knew Cardinal Martini well, and even saw him in June when he was in Milan. The pope writes...
Pope Benedict XVI: August 2012 Archives
The general intention 
That prisoners may be treated with
justice and respect for their human dignity.
The missionary intention
That young
people, called to follow Christ, may be willing to proclaim and bear witness to
the Gospel to the ends of the earth.
        
