Marcus Amos, 20, charged with murder at a Somerville housing project last night.

Amos pleaded innocent at his arraignment, was ordered held without bail until a dangerousness hearing on Friday, according to the Middlesex County DA's office.

The Transcript reports Amos was arrested on a cocaine-possession charge on Beechland Street last October.

Flashback to March:
Police tie six Roslindale shootings to single housing-project apartment.