Three young girls who were married off to polygamist leader Warren Jeffs 12 years ago are still missing, as their sect leader in Canada is on trial for arranging the cross border wedding ceremonies.

Canada's biggest polygamist, Winston Blackmore, 59, is currently being prosecuted by the Canadian government for polygamy, as the leader of the polygamous Fundamentalist Church of Jesus Christ of Latter-Day Saints (FLDS) community in Bountiful, British Columbia has a total of 27 wives and 145 children.

The charges against FLDS Bishop Winston Blackmore came after Special Prosecutor Peter Wilson approved three 'unlawful removal of a child from Canada…' charges against three members of the same polygamous community of Bountiful.

The three members, Brandon J. Blackmore, his wife, Emily Ruth Gail Blackmore and FLDS Bishop James Oler, were charged by authorities with alleged child trafficking offences that originate from 2004 and 2005 when they reportedly sent three under age girls - Millie Blackmore, Alyshia Rae Blackmore and Nolita Collen Blackmore - across the Canadian border to marry the now imprisoned FLDS leader Jeffs.

Canada's biggest polygamist, Winston Blackmore (center), 59, is currently being prosecuted by the Canadian government for polygamy. He has 27 wives and 145 children

As the sect leader in Bountiful, British Columbia, Winston Blackmore had a large amount of children (above) and is accused of helping to arrange the cross border wedding ceremonies for child brides

Brandon J. Blackmore and Emily Blackmore are now separated as husband and wife, but their charges center on the couple's 13-year-old daughter, Millie Blackmore, who was married off to a then-48-year-old Jeffs in 2004.

According to VICE, their son and her half-brother, Brandon S. Blackmore revealed the FLDS leader married Millie moments before he presided over his wedding ceremony in Colorado City, Arizona, as he was a member of Jeff's flock at the time.

Millie Blackmore is not the only sibling of Brandon S. Blackmore who was married to Jeffs, as Annie Mae Blackmore was married to the FLDS leader at an unknown date.

Apparently Jeffs sent word to their father in Canada that he also wanted to take on Millie Blackmore as a bride.

A March 1, 2004 journal entry dictated by Jeffs to one of his wives and was later confiscated by U.S. authorities in Texas apparently reveals what happened.

'I sat down with Brandon [J] Blackmore and his wife and his daughter, gave a training on the redemption of Zion in brief, in summary, and this girl was called on a mission, and they received it joyfully,' the entry reads.

'And there Mildred Marlene Blackmore, age 13, was sealed to Warren Steed Jeffs for time and all eternity.'

Millie Blackmore (above) was transported by her parents from Canada to the US to marry Warren Jeffs in 2004 when she was aged 13. Royal Canadian Mounted Police investigators are now searching for her

Alyshia Rae Blackmore (above) was also taken from the community in Bountiful to marry Jeffs when she was aged 12. Authorities are now searching for her as well

It also notes that her father witnessed the ceremony to Jeffs, as Brandon S. Blackmore had no idea she had got married the same day or even that she was in Colorado City at the time.

He explained to VICE that he didn't see Millie Blackmore for years around the Bountiful community, as people claimed that she was 'on a mission for the church.'

In 2013, investigators with the Royal Canadian Mounted Police (RCMP) asked Brandon S. Blackmore to listen to a recording of Jeffs having sex, as they wanted to know if the person on the tape was his teenage half-sister.

Even though her name was not said aloud on the tape, he could tell that it was his half-sister's voice and told RCMP investigators.

'He was asking her how it felt and a bunch of weird things,' Brandon S. Blackmore told VICE in an interview.

Brandon S. Blackmore shared that RCMP investigators told him the tape with Jeffs and his half-sister was recorded sometime around 2004 or 2005 at a motel in New Mexico.

Rachel Jeffs, the 32-year-old daughter from the FLDS leaders' second marriage confirmed that a series of teenage girls, including Millie Blackmore, had arrived to their household.

Rachel, who left the sect in 2015, told VICE that when she inquired about who the girls were, she was told they would be new wives for her father.

She explained that she never asked her father about why he married girls who were underage.

Millie Blackmore is not the only sibling of Brandon S. Blackmore who was married to Jeffs (above), as their sister Annie Mae Blackmore was married to the FLDS leader at an unknown date. Her whereabouts are unknown

'If you do, then you lose your place in the church,' Rachel explained.

'I wasn't so worried about losing my place in the church. I just would never get to see my family again.'

She shared that she remembered the teenage Millie Blackmore crying a lot.

Rachel added that the situation worsened when Alyshia Rae Blackmore and Nolita Colleen Blackmore arrived in December 2005 at the Yearning for Zion ranch, which is a compound for the FLDS in Texas.

'I saw her struggle emotionally a lot,' Rachel said of Millie. 'She wasn't really stable.'

Now, Mounties with the RCMP are searching for Millie Blackmore along with two other Canadian women, Alyshia Rae Blackmore and Nolita Collen Blackmore.

The other two women were also married to Jeffs when they were aged 12, as authorities believe all three of the women are now in their early to mid 20s.

It is believed that the three missing women are loyal to Jeffs, as many women apart of the sect are taught to be loyal to their husbands.

It's thought that Millie Blackmore, Alyshia Rae Blackmore and Nolita Collen Blackmore are all living on one of the many FLDS compounds in the U.S., or are being housed at secret locations that are known as 'Houses of Hiding' among members who are waiting for Jeffs to be released from prison (even though he is serving a life sentence).

The charges against Brandon J. Blackmore and Emily Blackmore are thought to be the first time that any parents within the religion have faced in relation to the reported pipeline of child brides that operated for years between the FLDS sects in Bountiful and the headquarters in Colorado City, Arizona and Hildale, Utah, according to VICE.

Oler is accused of having taken a 15-year-old girl across the Canadian border to the U.S. to marry then-24-year-old James Leroy.

Oler was also charged with polygamy along with his brother-in-law Winston Blackmore, who faced the same charge previously years ago.

In 2007, Winston Blackmore was first arrested for polygamy, but those charges were later dropped over concerns of how the special prosecutor was selected, the Salt Lake City Tribune reported.

Officials say much of the evidence for the cases against Winston Blackmore (above) and the other three members stem from the investigation into Jeffs

Winston Blackmore was charged again in 2014, and recently claimed that he and his wives are officially 'friends', adding that despite them being friends, 'they still charge us with polygamy'.

Officials say much of the evidence for the cases against Winston Blackmore and the other three members stem from the investigation into Jeffs.

All of the marriages within the FLDS have been reportedly stopped since Jeffs arrest, but it's unclear if members of the religion have continued to transport child brides across the border.

Authorities in both the US and Canada have been searching for signs of human trafficking and other crimes that could possibly be happening by members of the FLDS.

It's unclear if more charges are expected to be filed against FLDS members, as RCMP sergeant Terry Jacklin told VICE that the investigation continues into their marriages.