AS a mother, Tiarma Tambunan had a bad feeling when Ariel Somba Pamungka Sitanggang said his goodbyes before going to Surabaya. “I was worried. Ariel was traveling with someone he just met,” said the 66-year-old woman, recalling the events of April 23. That was the last day she saw her son.

Ariel, 33, bid his mother goodbye before leaving for Surabaya on business, and to help renovate the home of his friend, Ryan. When he left, said Tiarma,