On Friday, a press conference was held where Speaker Robert DeLeo confirmed that Bella is Baby Doe and that the two arrests have been made.
Suffolk County District Attorney Daniel Conley said during a later briefing that information on the cause of death will be released on Monday, adding that her life ended 'by violence in the place she should have felt safest: in her home'.
'We have a very good idea of what happened to her based on evidence,' Conley said on Friday.
'We have powerful evidence has provided us a manner of death that we will be able to prove in court.'
Conley said a descriptive account of what happened to Bella would be released in a press conference on Monday.
The state medical examiner still has to confirm Bella's identity through positive DNA testing.
'The men and women who investigated this case have given her her name back. Now we will give her justice,' Massachusetts State Police Col Richard McKeon said.
DeLeo said Bond and McCarthy, who are in custody, are blaming each other for Bella's death. He also added that McCarthy has drug issues.
Oh, my God, I can't believe it,' Tamera Bond added. 'I thought the picture looked like Bella, but Bella was a little chubbier.'
Tamera Bond said the last time she saw Bella was nine months ago, in January.
Bella's grandmother, who did not want to be identified, told WCVB that she didn't know her granddaughter existed - she hadn't spoke to her daughter Bond in 14 years.
'I think we maybe have to see our priest or something because i don't know what to do. This is shocking,' she said. 'I think it's our responsibility to do something.'
A tip-off from neighbors brought the nearly three-month long search to determine the girl's identity to an end on Thursday.
The Boston Herald reported that Siomy Torres, who had lived in the Maxwell Street building on the Dorchester-Mattapan line since June 2014, said state police showed up at her home and started questioning her about her neighbor's daughter.
'They told me they were looking for the little girl, and asked me if I'd seen her,' Torres said.
She said state police showed her the composite picture of Baby Doe and she recognized it.
'I haven't seen her in months. I usually hear her because her room is against the backside of my apartment. I usually hear her crying or running around the house and I haven't heard that,' Torres said. 'I used to see her every day. Running around.'
A DCF spokeswoman said it had contact with Bella twice between August and December 2012 and June and September 2013 on allegations of neglect, WCVB reported.
'Since June, the Department has been working closely with law enforcement on exploring dozens of leads in hopes to identify the little girl found on Deer Island,' DCF spokeswoman Rhonda Mann said.
'Now that we know her name, the story is no less tragic. DCF has not had an open case with this family for over two years, but did have brief involvement with Baby Bella as an infant.
'Our thoughts are with Bella's extended family as the investigation into her death continues.'
It was earlier reported on Friday that police were searching for Bond and McCarthy as persons of interest in the case.
Authorities said they were able to match Bella's identity with the clothes she was found wearing when her body was found on Deer Island in Winthrop on June 25, according to the Daily Beast.
She was wrapped in a zebra-print blanket and was wearing black-and-white polka-dot leggings.
In photos seen on social media, Bella is wearing a pair of black-and-white polka-dot leggings, but Conley would not confirm if these were the leggings she was found in.
Her body did not have fingerprints when she was found due to erosion by the tide and investigators have not determined a cause of death.
On Facebook, Bond posted several photos of Bella as they cuddled, cooked together and the mother once called Bella 'My love, my soul, my life. My heart beats because she's in my world.'
In another post she wrote: 'Love her to death. I am on top of the world because of her. My life is complete again and worth living. I give her the world and more if I can...'
On August 6, 2014, Bond made a post on her daughter's second birthday saying 'My lil bell. It's her b'day today. Happy birthday my sweetest thing ever...'
The last photos Bond shared of Bella on Facebook were on Christmas day last year.
- Daily Mail UK
