Almost five months after an Austin police officer disappeared into the interior of Mexico in what was called an “elaborate ruse” to stage his death, Officer Coleman Martin has resigned from the department. The Austin Police Department said Martin’s resignation was effective immediately. The 29-year-old, who turns 30 next week, triggered a massive search operation when his truck was found on the shores of Lake Amistad on the Texas border with Mexico with a suicide note in plain view.