It was dusk when Mikelle vanished. Even though Mikelle and her younger sister Kimber were apparently lured outside by the sound of an ice cream truck, police investigated every ice cream vendor who could have been in the area that evening and found there were none.
Do ice cream vendor normally work in the evening? Did her parents hear the sound of an ice cream truck too?
The message written on the dollar bill must have shocked Mikelle's parents. "I always believed that we were going to find her," Darien Biggs said. "I just never felt like we were going to find her alive."
"She was running from somebody, based on the evidence that we do have," said Gissel. "It wasn't somebody that she knew or wanted to be with. She dropped the bike, she was running toward home, she dropped quarters, and it was swift. And somebody grabbed her and, I believe, abducted her in a car and drove away with her."
Mikelle lived in a family-friendly and busy neighborhood, but police soon discovered there were no witnesses.
"Sheer chance," said Darien Biggs. "If the person that took her had been off by 30 seconds either way," it's likely someone would have seen it.
"We received an enormous amount of leads. ... Going through all that information was a huge task," said Det. Domenick Kaufman, who joined Gissel on the case. "We've been everywhere, at residences in Mesa, pig farms ... dump sites, the desert ... the mountains. ... You name it."
Police traversed all of Arizona and beyond in what would become the largest investigation in the state's history.
In the months and years after Mikelle vanished, the Biggses continued to raise awareness about their daughter, attending vigils and conducting interviews with the local media.
http://a.abcnews.com/2020/90-seconds-agonizing-search-spans-decade/story?id=7577706