WATCH: Mother of Missing 4-Year-Old Houston Girl Maleah Davis, whose Stepfather Says was Kidnapped, Speaks Out and Makes Plea for Her Return

As volunteers passed out missing person fliers and helped Texas police search for her 4-year-old daughter, Brittany Bowens broke down in tears Monday as she expressed her darkest fears for the little girl who recently underwent brain surgery.

“I’m terrified for Maleah,” Bowens said of her daughter, in an interview with ABC station KTRK-TV in Houston.

The search for Maleah Davis intensified on Monday as volunteers passed out fliers in Houston and searched a field near where the girl’s stepfather, Darion Vence, 26, told police three men accosted him when he had car trouble on Friday evening and took him, Maleah and his 2-year-old son hostage before dumping him and the toddler on the side of a road and fleeing with the little girl.

Vence told police that he and the children were headed to pick up Bowens at George Bush Intercontinental Airport when they were encountered by the men who took Maleah.

“My spirit is broken. I feel so lost,” Bowens told KTRK. “I can’t concentrate. I can’t focus. It’s just … it’s so overwhelming for me. It doesn’t seem real.”

Volunteers from a group called Texas EquuSearch set out on foot and by ATV in a field in northeast Houston, where Vence told police he was assaulted by Maleah’s kidnappers after he noticed something wrong with the Bowens’ silver 2011 Nissan Altima that he was driving and pulled over.

“According to Darion, what happens next is a blue pickup truck pulls up behind him, two Hispanic males get out. One of them makes a comment, saying that Maleah looks very nice, looks very sweet. The other male hits Darion in the head. Darion loses consciousness,” Sgt. Mark Holbrook of the Houston Police Department Homicide Division said during a news conference on Sunday.

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SOURCE: ABC News – Bill Hutchinson