It’s a trend of the narco-terrorists in Mexico targeting musicians and tv stars, usually because they have spoken out against the drug trade and violence. Just the other day some woman singer was shot in the throat. A day later while in her hospital bed, someone came into the room and finished the job.
Not quite. More usually it's because they're allied as a favorite or *mascot* of an opposition group. In some cases, videotaped executions of rival cartel members have been made, set to the tune of popular narcocorridos, following which not only the killers are targeted for revenge, but also the musicians.
Sometimes the musicians are unaware of the use of the appropriation of their musical output for such uses. Sometimes they know damd well.