There are 72 unaccounted for hours between the time Ana Walshe reportedly left her Massachusetts home and when she was reported missing, with very little details about her whereabouts in between. 

Walshe, 39, of Cohasset, Massachusetts, left her home on Jan. 1, was supposed to get a rideshare to Logan International Airport in Boston and fly to her job in Washington D.C., Cohasset Police Chief William Quigley told reporters.

There's no confirmation that she physically took the rideshare to the airport, but it could've been done off the books, according to the chief. 

Police confirmed she never boarded a flight, and the multi-jurisdiction search continued into the weekend.

Meanwhile, Cohasset detectives headed to D.C. to follow up on potential leads and conduct interviews alongside D.C.'s Metropolitan Police Department, Quigley said on Saturday.

MISSING MOM ANA WALSHE'S FORMER MASSACHUSETTS HOME BURNS

Walshe left her Cohasset home "early morning" on New Year's Day - most likely between 4 and 5 a.m. - while her family was sleeping, Quigley said.

There is no video images of her leaving, and security cameras haven't picked up images of her as of Saturday afternoon, according to police.

Her plan was to take a rideshare to the airport for a flight to Washington D.C., where she works for the real estate company Tishman Speyer. Walshe's flight to D.C. was originally booked for Jan. 3, but police said during a press conference earlier this week that she left earlier for "some type of emergency" at work.

There's no evidence that Walshe boarded any flight or made it to the airport, Quigley said this week. 

MASSACHUSETTS MOTHER ANA WALSHE GOES MISSING, LAST SEEN NEW YEAR’S DAY 

Walshe's husband and her employer reported her missing to Cohasset police. 

Walshe's husband, her employer and friends have been cooperative in what Quigely described as a "missing person case" that currently has no evidence of foul play. 

Cohasset police teamed up with outside agencies, including the Massachusetts State Police, to search a wooded area near Walshe's home and set up a staging area along Route 3A. 

POLICE SEARCHING ANA WALSHE'S POOL, WOODS NEAR HOME; DETECTIVES HEAD TO DC

A two-alarm fire broke out in Walshe's former home at 725 Jerusalem Road in Cohasset. 

All four occupants - three adults and a young child - made it out safely, according to authorities. 

"The cause of the fire is undetermined at this time and remains under investigation by the Office of the State Fire Marshal and Cohasset Police, though it does not appear to be suspicious," police said in a statement on Saturday morning. 

Cohasset police and the Massachusetts State Police resumed their search in multiple quadrants of the wooded area near Walshe's house. 

Investigators were seen going through the Walshe family pool and searching closer to the house, but police didn't provide an official update about what (or if) anything was found. 

Before Saturday's searches began, Quigely told "Fox and Friends Weekend," "Every hour, we're getting more concerned for her well-being … We have more questions than answers."

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Police describe Ana Walshe as being 5 feet 2 inches tall and around 115 pounds.

She has brown hair, brown eyes, an olive complexion and is believed that she speaks with an Eastern European accent, according to authorities.

MOSCOW, Idaho — A roommate who survived the Nov. 13 quadruple homicide near the University of Idaho campus "was able to give some additional identification" about the suspect to police, an attorney representing Kaylee Goncalves' family said Saturday.

Attorney Shanon Gray told Fox News' "Cavuto Live" the roommate, one of two who survived the gruesome attack, "is still a victim in this case."

"And the fact that she was able to give some additional Identification I think it beneficial in this case. She was able to give kind of type and build and what [the suspect] looked like a little bit — bushy eyebrows, things along those lines," he said. 

The roommate identified only as D.M. in an affidavit released Tuesday "opened her door for the third time" that Sunday morning "after she heard the crying and saw a figure clad in black clothing and a mask that covered the person's mouth and nose walking towards her."

UNIVERSITY OF IDAHO STUDENT STABBINGS TIMELINE

"D.M. described the figure as 5' 10" or taller, male, not very muscular, but athletically built with bushy eyebrows," the affidavit states.

After the suspect apparently walked past D.M. as she stood frozen by her door on the second floor of the home, the suspect walked toward the back sliding glass door, and "D.M. locked herself in her room after seeing the male," whom she did not recognize.

BRYAN KOHBERGER CASE: IDAHO MURDER VICTIM'S FAMILY VOWS TO BE PART OF THE JUDICIAL PROCESS ‘FOR THE LONG HAUL’

A 911 call was placed from one of the roommate's phones later that day at 11:58 a.m. Police arrived around noon and located the four victims — Goncalves and Madison Mogen, both 21, and their 20-year-old roommate, Xana Kernodle, and her boyfriend, 20-year-old Ethan Chapin.

The victims were stabbed to death with what investigators believe was a kind of "edged weapon" upon arrival. Investigators also discovered a tan leather Ka-Bar knife sheath beside Mogen's bed on the third floor, where she and Goncalves were stabbed to death. The sheath contained a single source of DNA that matched the suspect's profile, according to police.

The Moscow Police Department on Dec. 30 named Bryan Kohberger, a 28-year-old criminology Ph.D. student at nearby Washington State University in Pullman, as their main suspect in the case. Kohberger's vehicle, a 2015 white Hyundai Elantra, and his phone apparently tied him to the scene of the crime on the morning of Nov. 13. 

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Five days after the tragedy, on Nov. 18, Kohberger changed the license plate on his vehicle. 

A month after the Nov. 13 murders, surveillance footage captured the vehicle in Colorado. Indiana authorities stopped Kohberger twice on Dec. 15 before eventually letting him continue on to his parents' home in Albrightsville, Pennsylvania, where investigators recovered trash that contained DNA that "identified a male as not being excluded as the biological father of suspect profile."

IDAHO MURDER VICTIMS' ROOMMATE HEARD CRYING, SAW MAN IN MASK NIGHT OF KILLINGS: COURT DOCS

Gray said Goncalves' family was "relieved, initially, to find a suspect" and put a "name and a face to all of this stuff."

"No one knew anything about Kohberger until he was arrested," the attorney explained. "We didn't know anything until the name was given to the public. Obviously, since then, since we have a name and a face, I think all the families are going back and looking at if there [are] any connections between any of the victims in the case."

Police have not disclosed a motive for the murders.

A Latah County judge ordered Kohberger held without bond in the local jail during his initial hearing Tuesday morning.