It is 100% NOT normal. Yes, any suspect should hire an attorney. There have been cases throughout history when innocent people are charged with and even convicted of crimes they did not commit. This is extremely, extremely rare for middle class white people. It doesn't happen to them very often at all. Cases like the Aisenbergs are hugely rare.
But they do exist - Tonya Craft, Kevin Fox, the Aisenberg's - but such cases are exceedingly rare. In fact, I don;t think Kevin Fox qualifies. I don't think he qualified as middle income.
Nevertheless, the cases that do exist certainly certainly make it practical to hire an attorney when you are suspect or POI.
But again, the Aisenbergs are another case that totally proves my point about "normal" behavior of grieving, innocent parents when it comes to involving lawyers and clamming up: "After almost two years of tearful appeals and prayer vigils, of appearances on "Dateline NBC," "Geraldo" and "Larry King Live," of fund-raising, of please bring our baby home, an FBI battering ram splintered Aisenberg's front door in Bethesda on Thursday."
http://www.sptimes.com/News2/Sabrina/
By then the Aisenbergs had gone quite public.
The couple's first appeal to the media had been at 9:30 p.m. the day of the alleged kidnapping.
"This morning, someone came into our home and took our baby . . . out of her crib and took her out of her home, and I'm begging that person to please bring our baby back to us," Marlene told reporters.
The next January the couple participated in a media blitz.
On Jan. 10, they arranged to have the media cover their appearance at the Missing Children Help Center, in Brandon, Fla., where they went to help stuff envelopes. Two days after that, Steven taped a statement for a local radio station.
Two days later, on Jan. 14, the Aisenbergs appeared on the network television news magazine "Dateline NBC" in what was billed as their "first network prime-time interview."
Family videos were shown. Marlene wept. Steven told viewers that Sabrina "made our family whole."
"We know she's out there," he said, "and we know she's going to come back."
"Because whoever took her can't keep her," his wife added. "She belongs to us."
Two days later, it was "Larry King Live."
"In my heart," Marlene told King's audience, "I believe that . . . somebody out there wanted a baby to love and that they took mine to do that." Someone called in from California and said, "To the Aisenbergs, my heart goes out to you."
By then suspicion already had fallen on the parents.
That March, the couple was back on "Dateline," with Marlene proclaiming "total disbelief" at the situation: "Not only is my daughter gone, but they think I had something to do with it. It's just unbelievable."
A month later it was Geraldo Rivera.
http://www.washingtonpost.com/wp-srv/local/daily/sept99/kidnap11.htm
Innocent, grieving parents simply don't think about hiring attorneys until they are arrested. They think about finding their babies, or seeking justice for them.