Elon Musk, Jack Dorsey, and other tech execs respond with shock to fatal stabbing of Cash App creator Bob Lee: 'Violent crime in SF is horrific'

• Bob Lee's peers and industry leaders wrote social media posts mourning the Cash App creator.
• Jack Dorsey called it "heartbreaking," while Elon Musk lambasted "violent crime in SF."
• The San Francisco Police Department said an "active investigation" is underway.

Tech executives took to social media to pour heartfelt tributes and stunned reactions to the fatal stabbing of Cash App creator Bob Lee on Wednesday.