Michael Orleans Franklin, 41, died in Oakland, California, on December 14, 2016. His death was ruled a homicide, and investigators later reported he had been involved in a number of disputes and altercations in the months before he was killed.

Police said the inquiry produced witness statements, forensic analysis and digital evidence that tied suspects to the case. Several people known to Franklin through personal and business relationships were identified as having possible motives. Prosecutors brought charges including first-degree murder and conspiracy for the primary suspect that was later arrested.

The trial included emotional testimony from Franklin’s family about the effect of his death, and the prosecution described actions they said showed the killing was planned. What details about Franklin’s life or conflicts might help explain who had motive or opportunity?