The man who had his face chewed off Saturday afternoon is reportedly a homeless 65-year-old man named Ronald Poppo.
A witness said he saw a man, now identified as 31-year-old Rudy Eugene, chewing flesh from Poppo's face.
Eugene is former high school football player with a prior criminal record, including an arrest for possession of marijuana in 2008.
Eugene is also believed to be homeless at the time of the attack.
Police say as the men laid naked side by side, Eugene tore off the victim's cheeks, nose, and one of his eyes.
A Miami police officer shot and killed Eugene after telling him to stop attacking the man.
Amanda Aguilar, Fraternal Order of Police, says, "75 to 80 percent of his face was missing and he was actually swallowing pieces of the mans face."
While police say they've never witnessed anything this extreme... They've recently seen similar cases of people with no clothes on acting violently after taking a new potent form of LSD.
Aguilar says, "Inside their body their organs are burning up alive, they've reached temperature where their actually burning up and it actually makes them take off their clothes."
In the emergency room, they've seen an increase of people suffering from psychosis for a variety of drugs.
Emergency Room Physician Dr. Paul Adams says, "Cocaine and new lsds they cause delirium which means you don't make sense when you take them and when you don't make sense and you don't control your emotions, you don't control your actions, you find yourself in circumstances you just don't want to be in."
During and after the recent ultra music festival, dr paul adams says he has seen the effects of a designer drug nicknamed bath salts which also causes body temperatures to spike.
"And then people don't drink water while they're taking it so they become dehydrated. So you mix dehydration with elevated temperature with loss of inhibitions and you have a life threatening combination. Mix for disaster," says Adams.
Bath salts were banned in florida in 2011 but new formulations have become dangerously popular.
Some of the chemicals used to make bath salts were banned by the senate last week.
Experts say dangerously little research exists about the drug's effect on users.