From what I've seen it's far more common to see lolcows with pre-existing threads get charged with manslaughter through criminal negligence or intention to commit harm, with full-blown premeditated murder being a rarity, largely due to ego and incompetence. Dylan Hafertepen comes to mind with his current killrate of three dead (one from suicide and two from sillicone ball injections that were deemed voluntary despite him basically running a gay bdsm cult and forcing his members to comply), and there was that Russian guy who threw his girlfriend out in the cold in a tank top and she froze to death (or maybe she OD'd, I forget exactly what the determination was on that). A certain Simba Lion (there are two listed in Animal Control, one is still alive and active) commited suicide by cop after attempting to murder a couple of officers for no real reason and they returned fire, and another furry by the name of DangerDoberman got arrested for attempted murder after getting charged with dogfucking or something.
There are definitely lolcow murderers, most are just incomptent as fuck and either broadcast their plans prematurely for clout and get the FBI kicking down their door or kill people on a whim or by mistake or by proxy instead.
