Los Angeles (CNN) -- Even as she voiced guarded optimism about her son's recovery, the mother of a San Francisco Giants' fan beaten into a coma at Dodgers Stadium lashed out Thursday at those behind the attack -- as well as those who stood by, while it happened.
Ann Stow told HLN's Jane Velez-Mitchell that she believes the March 31 attack on her son, Bryan Stow, "was a random act of violence against somebody who was wearing Giants' colors."
"I'm not sure at what point they (should have) thought that somebody needed to step in and pull this guy away from my son," Ann Stow said Thursday. "I'm just really upset."
After the opening-day game in Los Angeles, the 42-year-old man was walking in the Dodgers Stadium parking lot when he was hit from behind with an object, police and his mother said. There are no indications that he knew the assailants, or that they attacked him for any reason beyond the fact he was wearing gear of the San Francisco Giants, who are the Dodgers' biggest rivals.
The attackers fled in a light-colored sedan driven by a woman with a young boy -- believed to be about 10-years-old -- inside, said police.
Reflecting on her last few weeks, Ann Stow said Thursday that she was especially angry at the alleged getaway driver.
"If that was her son, she got to spend Mother's Day with her son," Ann Stow said. "I was in the ICU with my son, who is on a ventilator with half his skull missing. That was my Mother's Day."
Police, including 17 detectives assigned to the case, have been unable to find the two men who attacked Stow in March. And this week, the Los Angeles Dodgers added $100,000 to increase to $200,000 the reward being offered for information leading to the beating suspects' arrest.
On Tuesday, Los Angeles Police Chief Charlie Beck kicked off a billboard campaign aiming to find the two men accused of ambushing and beating Stow. Over 300 billboards -- which advertise "Wanted" and "Attempted Murder at Dodger Stadium" -- are now up around the southern California city featuring composite sketches of the suspects.
"This case is one of the top priorities of the Los Angeles Police Department," Beck told reporters on Tuesday. "We need the public's help."
Stow, a father of two, is a paramedic who traveled from Santa Cruz, California, to make his first-ever visit to Dodgers Stadium. He went to the game with friends in celebration of the Giants' World Series victory last season, a relative said.
But after the game, the two men came up to him in the parking lot and -- unprovoked -- began kicking and punching him while yelling profanities about the Giants, police said.
Ann Stow said her son was first hit from behind, at which point he fell and his head hit the concrete.
"It was just a brutal attack," she said. "Whatever that guy hit my son with, Bryan was unconscious before he hit the ground, so he had no way to protect his head."
Stow was taken out of a medically induced coma over a week ago, and has since shown signs of some cognitive function, Los Angeles neurosurgeon Dr. Gabriel Zada said. In addition, the doctor said that Stow also has "some movement" in his arms and legs.
Earlier this week, he was transferred from Los Angeles County-University of Southern California Medical Center to San Francisco General and Trauma Center, bringing him closer to his home, Zada said.
Stow has been able to open his eyes in recent days -- a positive sign, said his mother, even though he still can't focus and is not looking around.
His children know about their father's condition, but still haven't seen him in the hospital, Stow's sister, Bonnie Stow, told HLN. The whole family, she said, is pulling for his recovery and hoping that any brain damage is minimal.
"I don't think it's a matter of him surviving," said Bonnie Stow. "It's just a matter of what he'll be, if and when he wakes up."
CNN's Greg Botelho contributed to this report.