Patrick Brown, 32, was killed on April 25, 2015, in Memphis when a shooter fired into the vehicle he was driving. He lost control, collided with a semi-trailer and the car erupted in flames; Brown died at the scene despite rescue efforts. A passenger, identified as Brown’s ex-girlfriend, survived with injuries and was later the subject of an attempted murder charge against the same suspect.

Authorities arrested Rebecca Lawson in connection with the killing and charged her with murder. Investigators found a troubled, obsessive past relationship between Lawson and Brown and say that history was a significant factor in the shooting.

What can readers add about Patrick Brown’s movements that day or about the relationship dynamics that might explain how the encounter escalated to lethal violence?