http://www.sfexaminer.com/sanfrancis...nt?oid=2838577

About 8:50 a.m., officers made a well-being check on a 41-year-old man at an apartment in the 400 block of 43rd Avenue, where it appeared a person died by suicide, Sgt. Danielle Newman said.

Emergency personnel also suspected that they encountered hazardous materials on the premises and thus evacuated the building, according to Newman. The stretch of 43rd Avenue between Point Lobos Avenue and Clement Street was also blocked for several hours while hazmat crews and the Medical Examiner's Office responded...

Humberto Quinonez, a Department of Public Health hazmat official who assisted with the investigation at the scene, said it appeared that a mixture of hydrochloric acid and calcium polysulfide created a hydrogen sulfide gas that killed the victim. "His skin was the color green in accordance with hydrogen sulfide exposure," Quinonez said.