This story falls in line with the previous Zombie Apocalypse stories, in that it involves “drug-induced” rages, police officers, and random attacks.
In a nutshell: A homeless man, allegedly jacked up on PCP attacks several random people, then goes after a police officer. Now the police officer is only armed with a baton, and as you can see from the security footage, is intimidated by this hulking monster approaching him. This is where another homeless man, Charles Alexander, is a hero and body slams the DRUG FUELED goon on his back, just as the Calvary arrives.
Like I have said in previous posts, this may not be an according to Webster zombie attack, but these super-high criminals are attacking random people, eating weird things (soap, ears, animals), and that are hard to stop with conventional means (bullets).  They are both becoming commonplace AND increasing in frequency.