A man already serving life in prison for a decades-old murder conviction has now been found guilty of running a meth distribution operation from inside the Guam Department of Corrections.  A federal jury in the District Court of Guam convicted Edward Demapan of conspiracy to distribute and attempted possession with intent to distribute 50 grams or more of methamphetamine following a nearly weeklong trial before Chief Judge Frances Tydingco-Gatewood.

Prosecutors say Demapan coordinated the drug operation from his DOC cell using a contraband cell phone, directing co-conspirators on the outside to pick up and move drug packages and send proceeds between Guam and Houston, Texas. The investigation was launched by the Drug Enforcement Administration in 2024 after suspicious drug shipments were uncovered.

Demapan has been incarcerated since 1995 for the aggravated murder of Yong Hee Choi, a case that went unsolved for years. He is now awaiting sentencing in the meth case, while also facing additional federal charges involving alleged fentanyl distribution and conspiracy with a correctional officer.

That separate trial is set for January of next year.