Caracas, Venezuela (CNN) -- In one of her last Twitter posts, Venezuelan beauty queen Monica Spear wished her fans peace, health and love.
The 29-year-old soap opera star was gunned down by the side of a country road less than a week later.
Spear and her ex-husband, Thomas Henry Berry, were driving in Venezuela's Carabobo state Monday night when their car broke down, officials said. Armed robbers opened fire, killing both of them.
Their 5-year-old daughter survived Monday's shooting, authorities said, but was shot in the leg.
"It is presumed that the motive was robbery," Venezuelan Justice Minister Miguel Rodriguez Torres said. "We are still investigating. There are five people detained who are being interrogated."
Spear was Miss Venezuela in 2004 and represented her country in the Miss Universe pageant the next year.
Her popularity opened the door to acting roles in soap operas that eventually made her an international star. She worked in Colombia and more recently in the United States, where she made her home in Miami.
She was vacationing in Venezuela with her family when she was killed. Hours before the shooting, she posted a video online showing scenic images of the countryside.
Spear, who studied theater at the University of Central Floridabefore winning the Miss Venezuela crown, appeared on the Telemundo soap operas "Flor Salvaje" (Savage Flower) and "Pasion Prohibida" (Forbidden Passion).
"We are deeply impacted and saddened by the horrible crime that the beloved actress Monica Spear and her family suffered," the network said in a statement. "Monica was not just a great professional, as she showed in the two soap operas that she worked on with us ... but also she was an excellent person, always enthusiastic and with great strength and determination."
Word of Spear's slaying spread quickly on social media and drew a massive response from fans in the South American nation and well beyond its borders.
Movie stars, fellow soap opera actors, athletes and government officials expressed sorrow and condemned the attack.
Venezuelan President Nicolas Maduro called the killing a massacre and said more needed to be done to put a stop to violence.
Venezuela is one of the world's most violent countries, according to a United Nations ranking.
One person is killed roughly every 21 minutes in Venezuela. And there were 24,700 violent deaths last year in the oil-rich country of roughly 30 million people, according to the nonprofit Venezuelan Violence Observatory.
"This happens every day in Venezuela. ... If the victim had not been this actress, the person would simply be one more statistic," said Luis Izquiel, a lawyer and criminologist in Caracas.
The observatory says the country's murder rate has soared to nearly 80 deaths per 100,000 people. Government statistics put the figure significantly lower, at 39 deaths per 100,000.
Richard Linares, Spear's Venezuela-based personal trainer, said the slaying shows how little life is valued in his country.
"Life does not matter," he told CNN en Español on Tuesday. "A life can be traded for some shoes."
"It devastates me that there is a 5-year-old girl who is asleep, and when she wakes up she will ask how her parents are, and she no longer has any parents," Linares said.
Venezuelan officials said they're committed to solving the problem.
A meeting of the country's governors to discuss crime-fighting strategies is scheduled for Wednesday.
"It is painful, not only the death of this beloved Venezuelan actress and the wound her daughter received, but also the death of any Venezuelan who falls in the hands of violence," Rodriguez said.
Authorities also said they had assigned two prosecutors to investigate Monday's slayings.
Spear's father told CNN affiliate Central Florida News 13 that he learned the devastating news about his daughter's death Tuesday morning while watching a Venezuelan television network in their Orlando, Florida, home.
"There's no words to describe our pain. This is something that never should have happened," Rafael Spear said.
After her successful stints in soap operas, he said, his daughter had planned to take her career toward roles in Hollywood movies and French films.
"She was a star," he said, "and she was the star of the family."
The beauty queen's daughter is in stable condition at a Caracas hospital, he said.
In an interview with The Huffington Post last year, Spear said she left Venezuela because of the country's security problems.
But Spear was eager to visit her home country over the holidays, close friend and CNN Latino anchor Maria Alejandra Requena said.
"She wanted to spend Christmas and New Year's in Venezuela," Requena said, "to travel around Venezuela, to let her little daughter know her country."
Journalist Osmary Hernandez reported from Caracas. CNN's Rafael Romo and Catherine E. Shoichet reported from Atlanta. CNN en Español's Camilo Egaña and Adriana Hauser contributed to this report.