Tech executive Bob Lee walked up an empty San Francisco street in the early hours of Tuesday gripping his side with one hand and his cellphone in the other, leaving a trail of blood behind him. “Help!” he screamed into his phone. “Someone stabbed me.” Those were some of the last words Lee said on a 911 call before collapsing on a Rincon Hill sidewalk, according to surveillance footage and records reviewed exclusively by The Standard. Lee, the 43-year-old chief product officer of MobileCoin, was taken to San Francisco General Hospital and later died. Police say he suffered two stab wounds...…Tech executive Bob Lee walked up an empty San Francisco street in the early hours of Tuesday gripping his side with one hand and his cellphone in the other, leaving a trail of blood behind him. “Help!” he screamed into his phone. “Someone stabbed me.” Those were some of the last words Lee said on a 911 call before collapsing on a Rincon Hill sidewalk, according to surveillance footage and records reviewed exclusively by The Standard. Lee, the 43-year-old chief product officer of MobileCoin, was taken to San Francisco General Hospital and later died. Police say he suffered two stab wounds...WW…