You’re right. Doing a little reading, it’s more common to get a false-negative vs. a false-positive. Also if her advocate took her in the middle of the day for her checkup, this would not be nearly as accurate as checking first thing in the morning (right out of bed).
From
FOXnews
"Surveillance videos obtained by "America's Most Wanted" show the suspected killer of a pregnant Marine using the victim's ATM card and buying paint and shovels believed to have been employed in an effort to conceal the crime, FOX News has learned.
Cpl. Cesar Armando Laurean, 21, is seen covering up a bank security camera with a towel or a rag while he uses the ATM card of 20-year-old Lance Cpl. Maria Lauterbach on Dec. 24.
He was also caught on tape
buying paint and shovels at a Lowe's store in Jacksonville, N.C."....
..."A witness in the murder of Lauterbach turned the instrument over to police, who would not confirm local media reports that it was
a crowbar.
"It was a person who had this item in their possession and did not realize its significance," Capt. Rick Sutherland of the Onslow County Sheriff's Office told FOX News on Thursday. "We have no reason to believe that they were involved in the homicide at all. ... We believe this item is consistent with the findings of the medical examiner.""...