mr. corvera in spanish. mr. corvera responding in english and spanish to the officers, but did not comply with either their commands to surrender. officer number 3 confirmed with the supervisor on scene that he could see a gun in mr. corvera's hand. officer number 3 warned nearby officers that "he's got it pointed in this direction, pointed in our direction from behind the front hood". mr. corvera could be heard saying "no, i cant talk to you. leave. go.". officer number 4 arrived on scene and was equip with department issued rifle. officer number 4 briefed on the situation by officer number 2. the contact officer said to mr. corvera ", jose, how can we help you today?". mr. corvera responded, "nothing, just go". at 803 a.m. the acting lieutenant declared a critical incident and established the command post. he and other supervisors requested additional resources including, the san francisco police department tactical unit, the crisis/hostage negotiation team or chmt, and for medical personnel to stage in the are