Police were checking on registered sex offenders in the area who might be connected to Sherin's disappearance, but noted there was no evidence she had been kidnapped.
Police officers and Federal Bureau of Investigation agents were at the home on Wednesday, and served a search warrant to look for evidence. He realized that she was missing 15 minutes after leaving her out there, added CBS Dallas/ Fort Worth. Both parents have retained attorneys - Sherin's mother was not accused of any wrongdoing, while her father had not yet entered a plea in relation to charges leveled against him.
Police issued an Amber Alert Saturday afternoon but canceled it Monday after no significant leads turned up in the case.
According to Wesley, at about 3 a.m., he put Sherin outside and told her to stand next to a large tree that was behind a fence, about 100 feet south of the family's home and across an alley and even admitted to police that he knew coyotes had been seen in that specific area though, investigators have not found any indication that Sherin was dragged away.
The girl's foster mother was reportedly asleep when Sherin went missing and she was unaware of what Mathews was doing. He was released on bond Sunday, but forced to wear an ankle monitor. "That's the question we want answered as well", police Sergeant Kevin Perlich told NBC5.
The investigators are baffled by the apparent delay in reporting the missing of the child.
"As far as why she was out there, how long she was out there, that's the questions we have for the parents", he added.
The 37-year-old father was arrested Saturday morning for child abandonment.
Investigators say she was adopted two years ago from an orphanage in India.
Police say tell KXAS that she has "developmental issues and has limited verbal communication skills". "The 3-year-old is Asian, 36" tall, weighs 22 lbs., and has black hair and brown eyes. Investigators are also now reviewing footage from surveillance cameras, cellphones and laptops to try to determine the whereabouts of the child. Meanwhile, some community members have organized their own efforts to find the little girl.