Police reported no arrests and said investigators continued to look for potential witnesses. Capt. Rafael Rosa told reporters they were following several leads, but declined to say whether police had identified any suspects. He said very few witnesses were cooperating.
Hector Camacho Jr. decried the violence that grips Puerto Rico, a U.S. island territory of nearly 4 million people that reported a record 1,117 homicides last year.
"Death, jail, drugs, killings," he said. "That's what the streets are now."
Camacho's sisters have said they would like to fly Camacho's body to New York and bury him there. Camacho grew up mostly in Harlem, earning the nickname the "Harlem Heckler."
He won super lightweight, lightweight and junior welterweight world titles in the 1980s and fought high-profile bouts against Felix Trinidad, Julio Cesar Chavez and Sugar Ray Leonard while compiling a career record of 79-6-3. He knocked out Leonard in 1997, ending the former champ's final comeback attempt.
Camacho battled drug, alcohol and other problems throughout his life. He was sentenced in 2007 to seven years in prison on burglary charges, but a judge eventually suspended all but one year of the sentence and gave Camacho probation. He wound up serving two weeks in jail after violating that probation. A wife also filed domestic abuse complaints against him twice before their divorce.