... As far as we know.
The poems were completely unrelated to the murder, and the only reason one of them was in the vicinity of the victim was blind, stupid bad luck. Representatives of a local church called in and revealed that the cryptic poems were nothing but remainders of a Halloween party, for which several church members made up a bunch of elaborate mysteries for kids to solve.
This particular mystery, which by now was known in the media as the "Liquid Matthew Case" (on account of featuring a now-liquid Matthew) was but one of many, and the only reason the notes were still hanging around was that it rained a whole lot on the night of the game and no one could be bothered to go clean up all the dubious murder notes.
Next to everything else churches do to youth groups, this was labeled "not that creepy, considering."
After the youth group leaders and the detectives shared a hearty laugh while presumably slowly backing away from each other hoping no one would get arrested or murdered, it was back to normal police work. The dead guy was eventually identified as Francisco Patino Gutierrez, and an informant revealed he was a seaman who had allegedly smuggled 11 pounds of cocaine into Miami and gotten killed for his efforts. On one hand, his murderer was not flamboyant enough to leave whimsical notes behind for the cops, so that's something of a downer. On the other, at least he didn't melt the guy.