From the safety of suburban Australia, Bou Rachna recalls her husband Kem Ley, a prominent Cambodian political analyst, who was shot dead at a Phnom Penh gas station in a 2016 killing that rattled the nation. She and her five children arrived in Australia last month where they were granted asylum, but reminders of the violence that felled Kem Ley have followed them, with death threats mailed to the family ahead of a visit to Sydney by Cambodia's strongman leader Hun Sen for a special Australia-ASEAN summit this week.