MIAMI (AFP) November 21, 2012, 6:43:24 PM EST
His heart stopped briefly overnight and he is being kept alive with a respirator and other machines, while doctors evaluate whether to declare him brain dead, they said.
"The bullet damaged three arteries that run through the neck and as a result blood is not flowing well to his brain," he said.
His mother, Maria Matias, arrived from New York early Wednesday. The Spanish-language TV channel Univision said his brother and children were also expected, as the family decides whether to disconnect an artificial respirator.
Undefeated super lightweight champion Hector "Macho" Camacho Jr. (R) swings at opponent Rocky Martinez (L) during their bout at a nightclub in 2001 on Miami's South Beach, FL. Camacho was in a deep coma with a "very poor" prognosis after being shot in the neck in Puerto Rico, his doctor said.
"His mother already knows that the outlook is not good, and we told her to prepare for the worst scenario. We will continue to do tests tonight and tomorrow morning," Torres said.
"But we have to stress that Macho Camacho is breathing with a respirator and his blood pressure and pulse are being maintained by machines."
The driver, Alberto Mojica Moreno, 49, was killed in the shooting.
It was unclear if they were targeted or simply caught in a random act of violence.
John Parra/Getty Images/AFP/File
Hector 'Macho' Camacho arrives at the Premio Lo Nuestro a La Musica Latina at American Airlines Arena in February 2012 in Miami, Florida. Camacho was one of the most colorful boxers of the 1980s.
Television images and photographs circulated on Twitter showed the ex-boxer on a hospital gurney, with an oxygen mask and tubes, covered by blood-soaked covers. It said he was unconscious.
Torres said Camacho's heart stopped at 4:15 am (0815 GMT).
"We were able to pull him back with drugs. We gave him drugs and his heart started beating again," he said, adding that neurologists said they "cannot do anything for him."
"This is a process and we have to wait for two different indicators to declare brain death," he added.
Camacho was one of the most colorful boxers of the 1980s.
Camacho was accused of hitting and stomping on his son, police documents say.
The incident took place on March 22, 2011, allegedly over money Camacho apparently believed was missing at his ex-wife's home, the documents show.