Dr. Mark Louie Tamayo is a proud alumni of the Philippine College of Criminology (PCCR) and the ninth placer of the 2014 Criminal Investigation Course of PNP. He was also a PSSLAI scholar at Ateneo de Manila University-Center for Family Ministries, 2019. He is a Police Investigator at Masambong Police Station (PS-2) in Quezon City, as well as a Facilitator/Life Coach at FORM POLICE. He has won numerous awards, including Best Junior PNCO of the Year for two years in a row (2017 and 2018.) He also lectures for PNPTS and NCRPO-RSTU, as well as Drug Abuse Resistance Education (DARE) and the Anti-Cybercrime Group. He co-wrote two books, Forensic Questioned Documents Examination: A Textbook for Criminology Students & Practitioners and GUNS and AMMO of Police Investigative Report Writing, with a number of authors.