The Guardian reports that Pakistan has arrested a former militant leader over the Daniel Pearl killing in 2002. Daniel Pearl, a Wall Street Journal reporter, was kidnapped in Karachi and subsequently beheaded. You might be wondering what place this grim story has in a blog that's (mostly) about computing - Daniel's father is the Turing Award winning computer scientist Judea Pearl. Research communities are often surprisingly close and when the terrible news broke the Artificial Intelligence community was shocked at the savage killing of a colleague's son. Since his son's murder Judea Pearl and his family has established the Daniel Pearl Foundation "to continue Daniel's life-work of dialogue and understanding and to address the root causes of his tragedy. The Daniel Pearl Foundation sponsors journalism fellowships aimed at promoting honest reporting and East-West understanding, organizes worldwide concerts that promote inter-cultural respect, and sponsors public dialogues between Jews and Muslims to explore common ground and air grievances."