District of Columbia officials are releasing body camera footage related to the death of a special education teacher who was taken into custody by security guards at a Washington apartment building.

The mayor and chief of police were set to discuss the footage at a press conference Tuesday afternoon.

A spokeswoman for the city medical examiner's office said Monday that the death of 27-year-old Alonzo Smith has been ruled a homicide, and that the cause was a heart attack complicated by "acute cocaine toxicity" and compression of his torso.

Smith died Nov. 1.

The city said in a written statement that officers were called to an apartment building about a reported assault and arrived to find Smith handcuffed by security guards. He was unconscious and not breathing.