Alonzo Demetrius is a trumpeter, composer, performer, and activist - he prides himself on versatility, technical precision, and adaptability. He is the founder and bandleader of the genre-fluid band The Ego, who performs throughout the New England and New York metropolitan areas since the fall of 2017. His debut album, Live From the Prison Nation, was developed as his form of protest against, and education about, the Prison Industrial Complex. He not only performs this music, he also creates an experience that elevates the conversation about how communities can collectively address social and racial inequities.

Demetrius attended Berklee College of Music after earning a full-tuition scholarship where he obtained a Bachelor of Music degree in Professional Music with concentrations in Jazz Composition and Performance. His time at Berklee expanded his musical vocabulary beyond classical and jazz to gospel, R&B, hip-hop, country, fusion, world music, and more. Following his graduation from the undergraduate program in the Spring of 2018, he accepted an invitation to the highly selective Berklee Global Jazz Institute Master's Program, graduating with a Master of Music in June 2019.

In April of 2020, Demetrius was signed to Onyx Productions by the late Ralph Peterson. In an interview, Peterson explained that he was impressed by Demetrius’ “social justice message as much as his musical message.” He added, “The fact that Alonzo’s music has today’s edge on it is exactly what I wanted for the label.”

Demetrius and the Live From the Prison Nation album have been featured in Downbeat Magazine, Financial Times, and Occhi Magazine, among others. In May of 2021, Demetrius recorded a compilation of two of the songs from the album for NPR @Home series.

Alonzo Demetrius has had the privilege of working with an ever-growing list of notable musicians spanning several genres including Terence Blanchard, Ralph Peterson Jr., Dezron Douglas, Tia Fuller, Robert Glasper, Jason Palmer, Solange Knowles, Brasstracks, The Fugees, and many more.

"Many may wear their passions on their sleeve, but none wear it more passionately than Demetrius, whose sound and vision echoes that of Christian Scott aTunde Adjuah and Roy Hargrove." MIKE JURKOVIC, ALL ABOUT JAZZ