Maguindanao massacre: how a manservant, a backhoe and a flurry of texts helped convict the Ampatuans

• Last week, a Philippine court jailed 29 members and associates of the powerful Ampatuan clan for life for the 2009 Maguindanao massacre
• The family’s legal team had been convinced their clients would walk free – here we explore three key pieces of evidence that helped secure the convictions