By MANUEL RUEDA, Nov. 21, 2012, ABC News/Univision

UPDATE 12: 20 PM - El Nuevo Dia reports that Hector "Macho" Camacho is brain dead. "Medically, there's nothing to do," says one of his doctors, Ernesto Torres. Read more (in Spanish) and watch the live stream outside the San Juan hospital where he is being treated.

Puerto Rican boxer Hector "Macho" Camacho is fighting for his life in aSan Juan hospital as he struggles to recover from very serious bulletwounds.

Camacho was rushed to the Rio Piedras Medical Center in San Juan lastnight after a gunman shot him in the face while he was in his car with afriend near a shopping mall in the town of Bayamón.

Doctor Ernesto Torres, the Medical Center's Director said on Wednesdaymorning that Camacho's chances of survival were slim. But explained thatdoctors can keep him alive with the help of a respiration machine forthe next few days to see if the 50-year-old boxer eventually responds totreatment.

Torres said that a bullet aimed at Camacho's face, was deflected by hisjaw, and made it's way to the top of the boxer's spinal chord, whichmeans that if Camacho survives he could have trouble walking, or mayeven be paralyzed.

He added that Camacho suffered a brief heart attack at around 4:15 amlocal time. "His heart stopped working...we gave him medicines and hisheart started pumping again. He has [some cerebral activity] but itsvery, low," doctor Torres told Puerto Rican Newspaper El Nuevo Dia.

The news of Camacho's shooting has taken over newspaper headlines and TVprograms in Puerto Rico, where the retired boxer holds somewhat of arockstar status.

Born on the island but raised in New York City, Camacho became one ofthe most popular fighters of the 80s and 90s, winning world titles inthe Super Featherweight, Lightweight, and Light Welterweight divisions.

Camacho put up some dominant performances during his long career, in which he won 88 fights, and only lost six.

He knocked out Sugar Ray Leonard, and twice defeated Roberto "Mano dePiedra," Duran, but also lost highly publicized bouts with Julio CesarChavez, and Oscar de la Hoya, who defeated Camacho in 1997.

Outside the ring, Camacho became famous for his erratic conduct and forbeing in trouble with the law. He was arrested as a teenager for gettinginto street fights. After retirement he was arrested for burglary inMissisipppi and earlier this year he was detained in Florida on childabuse charges.

Camacho's fans however, will recall his confidence in the ring, and hiswild boxing outfits printed with the colors of the Puerto Rican flag.

In the United States Camacho also stayed in the limelight byparticipating in "Mira Quien Baila," a Univision show that resemblesDancing with the Stars. Thanks to his charisma, Camacho also madeseveral appearances on the Univision show "El Gordo y La Flaca," wherehe became the show's unofficial "Mira Quien Baila" critic.

Police in Puerto Rico are still investigating the incidents that led to the shooting of Macho Camacho.

According to Captain Reinaldo Santiago, a detective with Bayamon Police,Camacho and his friend, Alberto Mojica, were parked in front of a localstore when an SUV with two gunmen pulled up next to Camacho's GreyMustang.

Witnesses said a gumnan descended from the SUV and shot Camacho and Mojica, who died in the incident.

Police chased the SUV but were not able to detain its occupants. Theysaid they knew little about Mojica, except that he was also a formerboxer and a fan of cockfights.