Ex-army captain in Singapore jailed 17 months for sex with 15-year-old boy. Two Singaporean men lost their positions in the armed forces after they were convicted of having sex with a 15-year-old boy. Former army captain Chaw Chia Jun, 41, was sentenced to 17 months’ jail on Tuesday, while his co-accused Owen Toh Wei Song, a former navy cook, was jailed for 12 months on September 22, according to CNA. Singapore’s Ministry of Defence has.