The WBZ Investigative Team at CBS Boston reported Monday that police identified a suspect in the death of 19-year-old Daniel Hollis, a sophomore who suffered severe brain injuries following an altercation in Brighton Saturday, Sept. 28.

Chief Investigative Reporter Cheryl Fiandaca reported that a surveillance video of the incident shows Hollis being punched, and falling onto stairs or concrete, and hitting his head. Hollis was bleeding in the street when Boston police arrived.

CBS said the alleged assailant is enlisted in the United States Marine Corps and is now back on a base in California where he was scheduled to be deployed. The Marines are allegedly aware of the investigation and are cooperating with homicide detectives, Fiandaca said on CBS Boston.

Investigators, who have classified the case as a homicide, have no timeline for when charges will be filed against the Marine or when he will be arraigned in Boston. Fiandaca said the Suffolk County District Attorney is assembling a grand jury to hear evidence in the case.

Hollis was pronounced dead Wednesday at 5:32 p.m., according to a statement from the Hollis family on caringbridge.com. Hollis played goalie for the Emerson men’s lacrosse team.

The Hollis family announced on Sunday that they will be holding a funeral for Hollis at Faith Community Church of Hopkinton in Hopkinton on Sunday, Oct. 13. The funeral will take place at 3 p.m., with visitation scheduled on Saturday, Oct. 12 from 1 p.m. to 5 p.m. at Buma-Sargeant Funeral Home in Milford.

Correction: a previous version of this article stated that the viewing and funeral were on Oct. 13th and Oct. 14th, they are on Oct. 12th and Oct. 13th.