Following the toxicology reports, Schuler's husband said his wife had left the campground, where the road trip began, completely sober.
"I don't say that the report is accurate or not accurate," the Schulers' lawyer, Dominic Barbara, told "Good Morning America's" Chris Cuomo Aug. 7, referring to the toxicology report. "What I say is that none of this case is logical."
"Something medical had to have happened," Barbara said in a press conference the day before.
Barbara has tried to pin the crash on a stroke caused by an underlying diabetes condition. Daniel Schuler and his attorney have said that they believe it's possible Diane Schuler suffered a transient ischemic attack, or TIA, a mild strokelike condition that can cause disorientation.
Experts told ABCNews.com such an attack is unlikely.
"This is not typical presentation for TIAs," Dr. Larry Goldstein, director of the Center for Cerebrovascular Disease at Duke University, said. "There are many, many other potential causes to have an alteration of behavior. TIA would not be in my top three causes."
Previously, Barbara suggested that Schuler may have ingested alcohol in an attempt to raise a low blood sugar level, a theory experts said demonstrates a fundamental misunderstanding of both diabetes and strokes.
"There is no way that having a stroke or that diabetes prompted her to drink. There is no medical explanation that would explain that assertion," said Dr. Aman Patel, director of the neurosurgery residency program at Mount Sinai Medical Center.
Schuler's prolonged erratic driving suggested that she was not affected by a stroke. During the four hours she was on the road, Schuler crossed the median on the Taconic State Parkway three times and state police received a number of calls reporting her.
"This is a killing. Don't call it an accident," Irving Anolik, attorney for the Bastardi family, who lost a father and son in the wreck, told "Good Morning America" last week. Anolik said that any medical condition theories are "at war with the autopsy report, with the blood analysis, with the whole panorama of things that surround this killing."
Still, Daniel Schuler insisted during the news conference that he had never seen his wife drunk and that "she was the perfect wife."
"Do you think we'd be doing this if we thought she was an alcoholic?" Barbara asked.
Mourning family members are incredulous.
"We had an occasional pina colada at a family barbecue," Jay Schuler, the wife of Daniel Schuler's brother, said on "GMA." "She was meticulous, safe, I trusted her with my son when I left the country ... those three girls before her own children were her life."
"This is absolutely not the woman they know," she said. "[Not] who I trusted my children with."
The Associated Press and ABC News' Lee Ferran contributed to this report.