HOUSTON, Texas -- Search efforts for 4-year-old missing girl Maleah Davis resumed Tuesday morning in northeast Houston but has since been moved to southwest Houston.
Crews started searching early in the area where the girl's stepdad says he, Maleah and his 1-year-old son were first ambushed by three men Friday night. Now Texas EquuSearch will be looking in the area of Bissonnet and Kirkwood, near the stepdad's address.
Texas EquuSearch volunteers began looking for Maleah on Monday after the Houston Police Department requested the group's immediate help.
Their search began on foot and by ATV in a field near Highway 59 and Greens Road.
Searchers on foot are going into the thicker brush. They're dealing with snakes, mud and rain. But they're determined to find Maleah alive.
"We want to start checking every single dumpster just in case," said Texas EquuSearch's Tim Miller. "We believe in miracles. Let's hope we get one."
"I'm choked up right now thinking about her," Miller told ABC13. "I've been on these cases before. If it doesn't touch your heart, and you don't get emotional, you're just not human."
WATCH: 'We believe in miracles'
Time is of the essence in the search. Maleah has had several brain surgeries and requires medications and constant care.
Monday night, ABC13 learned the child was recently returned to her home after CPS removed her last August.
According to CPS officials, the girl and her two siblings - 5-year-old and 1-year-old boys - were removed as the agency investigated allegations of physical abuse related to her head injury.
The three siblings were brought back in February.
In an exclusive interview with ABC13 Eyewitness News, Brittany Bowens, Davis' mother, said it was determined a fall was the cause of the girl's injuries.
The current search for Maleah stretches back to what allegedly happened Friday night. The girl's stepfather, Darion Vence, said he pulled over, with Maleah and his 1-year-old son, to check his tires because he heard a popping noise near Greens Road and Highway 59.
The family was on the way to pick up Bowens from Bush Intercontinental Airport. Bowens said she had just returned to Houston after attending her father's funeral.
As Vence was checking his vehicle, he claims three Hispanic men in a 2010 blue Chevrolet crew cab pickup truck pulled up.
Police said that's when Vence was hit on the head by one of the men and lost consciousness.
The next thing he knew, Vence said he woke up on the side of Highway 6 near First Colony Mall around 6 p.m. Saturday. His son was with him, but Maleah was not.
Police said Vence went to Houston Methodist Hospital in Sugar Land around 11 p.m. to seek treatment for his injuries with his son.
Maleah's stepfather said she was last seen in the 16500 block of the Southwest Freeway.
Meanwhile, Bowens tells ABC13 they called police Saturday morning to file a report because they were concerned after not hearing from Vence.
Maleah was wearing a pink bow in her hair, a light blue zip jacket, blue jeans and gray, white and pink sneakers.
She is described as an African-American female with black hair and brown eyes. She stands 3 feet tall and weighing 30 to 40 pounds.
RAW VIDEO: 'I'm terrified for Maleah' Mom of missing girl speaks to ABC13
Bowens told ABC13 on Monday that she's terrified for her daughter.
"My spirit is so broken, I feel so lost. I can't concentrate, I can't focus. It's so overwhelming for me. It doesn't seem real," Bowens said tearfully.
Family members were out in the Sugar Land area handing out fliers on Monday, with people who didn't even know Maleah joining in to help.
"Anything helps. Share a post, share a flier, anything. It is greatly appreciated and I mean that from my heart, I mean that with every bit of me," Bowens said.
Bowens has also said she isn't questioning Vence's story.
"There's not one thing in my soul that says that he would do that," she told ABC13.
Vence's 2011 Nissan Altima also has not been found and is considered stolen. It has Texas tags 330-92G9. Texas EquuSearch says it has received a handful of tips about the vehicle and plans to follow up on those tips Tuesday.
Once an Amber Alert is issued, it is typically resolved in 24 hours, but not always, says Beth Alberts, CEO of Texas Center for the Missing and Director of Houston Regional Amber Alert System.
Alberts told ABC13 that statistically, the longer a child is missing, the more likely harm has come to them. The statistics are based on the circumstances.
At the same time, she points out that there are cases like Elizabeth Smart, Shawn Hornbeck, and Jaycee Dugard, who all eventually returned after an extended period of time.
"So you never for a minute assume that something horrible has happened. You always assume that you are going to find a live child," Alberts said.
"We have a 95 percent alive success rate, so you never lose hope," Alberts continued.
Investigators have spoken with Maleah's biological father, and he is cooperating with police.
Anyone with information on Maleah Davis' whereabouts is urged to contact HPD at 713-308-3600 or Crime Stoppers at 713-222-TIPS.