Lori Vallow, the mother of two Idaho children missing since September, was arrested in Hawaii on Thursday on felony child desertion charges. She is being held on $5 million bail.

Police in Kauai said they do not believe Joshua "JJ" Vallow, 7, and Tylee Ryan, 17, are on the island.

The children were last seen in Rexburg, Idaho, and Vallow, who was also charged with contempt of court and other misdemeanors, missed a January deadline to bring the children to authorities.

Rexburg police have said they “strongly believe that Joshua and Tylee's lives are in danger.”

Newly released Idaho court documents allege Vallow lied several times about her children’s whereabouts. Her bank account shows no sign that she is providing money to care for the kids, Rexburg police Lt. Ron Ball said in a document filed this week.

Feb. 21:Mother of 2 children missing since September appears in court; bail set at $5 million

Court documents say JJ’s winter clothes and other belongings have been found in an abandoned storage unit.

When police announced in December the children were missing, police also said they were investigating the death of Tammy Daybell, the late wife of Lori Vallow's new husband Chad Daybell.

Underpinning the investigation are a series of suspicious deaths and "cult"-like religious beliefs. Here's what to know about the deaths connected to Lori and Chad Daybell:

Lori and Chad Daybell marry within weeks of Tammy Daybell's death

On Oct. 19, Tammy Daybell died of what was initially said to be "natural causes." According to KSAZ-TV in Phoenix, no autopsy was performed on the 49-year-old mother of five who had been married to Chad Daybell for roughly 30 years.

Within in weeks, Lori and Chad Daybell were married, in Hawaii, per KSAZ-TV.

On Dec. 11, police exhumed Tammy's remains to perform an autopsy, with results pending. When police announced the children were missing, they also noted that Tammy's death "may be suspicious."

Chad and Tammy Daybell had lived in Idaho for several years, and Chad was a writer who published dozens of novels and an autobiography on his near-death experiences and apocalyptic beliefs.

Police welfare check on Joshua Vallow

Joshua Vallow's biological grandparents, Kay and Larry Woodcock, were concerned after not hearing from the boy for months. Lori Vallow had moved the children to Idaho in August, but she had not told the Woodcocks or other family members where they were.

Kay Woodcock told "Dateline" she discovered Lori was in Idaho when she logged into the email account of her late brother and Lori's ex-husband, Charles Vallow.

Woodcock contacted authorities, and police in Rexburg tried to perform a welfare check on the child, who was not present. Police say Lori and Chad Daybell lied about Joshua and Tylee's whereabouts, and when they returned the next day, the couple had fled.

In December, police said that they believed both children's lives were in danger and that Vallow knew where they were or what had happened to them.

Lori's brother fatally shot her ex-husband

In July, Charles Vallow, Lori's estranged husband and adoptive father of Joshua, arrived in Arizona where she and her children had been living.

Police in Chandler said Lori's brother, Alex Cox, called 911 and said he shot Charles Vallow after an argument between Charles and Lori broke out.

Cox claimed self-defense, but on "Dateline," detectives said details in Cox's and Lori's stories did not add up and they exhibited strange behavior not typical of family members whose relative had just died.

Kay Woodcock told "Dateline" her brother was not a violent man, but Cox said Charles Vallow struck him with a baseball bat.

Chandler police had an open homicide investigation into the incident, but no arrests were made.

Lori's brother dies in December

Alex Cox is the most recent confirmed fatality in the string of deaths tied to the case.

He died Dec. 12 in Arizona after a man who said he was Cox's girlfriend's son called 911 when finding Cox unresponsive, KSAZ-TV reported. The TV station also reported Cox had recently married in Nevada.

An autopsy was performed and results are pending. Police have said Cox's death remains under investigation.

Lori had been married several times before

According to the East Idaho News, Lori Vallow has been married at least five times.

Her first marriage in 1992 ended in divorce to an unknown man, the news outlet reported.

Marriage records show she married William Lagioia in 1995 in Travis County, Texas. Vallow was 22 at the time, and Lagioia was 23. His current status is unknown, but he is the biological father of Lori's eldest son, Colby Ryan, per the East Idaho News.

In 2001, she married Joseph Ryan, who is Tylee Ryan's biological father, the news outlet reported. Their marriage ended in divorce in 2004, and Joseph Ryan died of an apparent heart attack in 2018, KSAZ-TV reported.

In 2006, Lori and Charles Vallow married. Friends and family told "Dateline" the couple apparently had a happy marriage in their early years. Charles had a successful business, and Kay Woodcock wanted her brother and his wife to adopt Joshua, for whom they had been caring.

The family lived in Hawaii for a couple of years, but returned to Arizona in June 2018, "Dateline" reported. Within a year, Charles Vallow filed for divorce.

Charles Vallow's divorce records: Lori said she was 'a god'

In his February 2019 divorce filing, Charles Vallow described Lori as uninterested in him or Joshua "because she had a more important mission to carry out."

Lori claimed she was "a god assigned to carry out the work of the 144,000 at Christ's second coming in July 2020," the court documents said.

Charles feared Lori would try to kill him and she allegedly told him she had "an angel there to help her dispose of the body," court documents said. Shortly after her alleged threats, Charles took out an order of protection against Lori, according to court documents.

Charles was shot dead in the altercation with Alex Cox about five months later.

Contributing: Jordan Culver, USA TODAY; Chelsea Curtis, Arizona Republic

Follow USA TODAY's Ryan Miller on Twitter @RyanW_Miller