Andrew Buen, a former deputy with the Clear Creek County Sheriff's Office, was sentenced to three years in prison over the fatal shooting of Christian Glass.
Frank Sato Felix was sentenced to three consecutive terms of life in prison without the possibility of parole while Joshua Charles Acosta was sentenced to life in prison without the possibility of parole, plus an additional 75 years.
Christopher A. Banks, 37, was charged with possessing a sexual performance by a child and his 38-year-old brother, Mark G. Banks, was charged with sexual misconduct.
The police officer was the final of three people convicted of mistreating Piang Ngaih Don, a Myanmar maid who died in 2016 at the weight of just 24 kg.
Capital punishment in Singapore is imposed only for serious crimes, such as the trafficking of significant quantities of drugs which cause serious harm.
Jorge Mares Raygoza, 47, killed his 45-year-old wife, Coral Liamas Sifuentes, after finding out about an extra-marital affair she was having with another man.