Conley said that Bond will be sentenced in a week or two, and she will be held accountable, noting she's spent almost two years in prison so far.
The disturbing saga began two years ago when an unidentified toddler's partially decomposed body was found in a trash bag off the shoreline of Deer Island in Boston.
Justice is served as Michael McCarthy was convicted this morning of killing of two-year-old Bella Bond, offering up no visible reaction as the court rendered their decision.
The state argued that McCarthy killed Bella, their key witness being Bond.
Bond pleaded guilty in February to being an accessory after the fact of murder and larceny over $250 by false pretenses for continuing to collect state benefits for Bella after her death.
McCarthy - the ex-boyfriend of the little girl's mother - was charged soon after Bella's body was identified.
"An innocent life was not merely snuffed out, but callously discarded", Conley said.
Suffolk County District Attorney Daniel Conley told reporters after the verdict was read that Bond's testimony was truthful. She had to testify against her former boyfriend.
"Today, there is no justice for Bella Bond", he said, adding that they will appeal.
"As prosecutors, we wish more than anyone that every case came to us with upstanding witnesses, strong forensic evidence, and a motive unique to the offender, but real life doesn't work that way", he said.
She tearfully described how she allegedly helped McCarthy stuff her daughter's lifeless body in a duffle bag and then throw it into a river in South Boston, CBS Boston reports. Under a plea deal with prosecutors, Bond is expected to be released after McCarthy's trial, serving less than two years in jail.
Rachelle Bond testifies in Suffolk Superior Court under questioning from assistant district attorney David Deakin in Boston on Monday, June 5, 2017. "But at the same time, that doesn't make her a murderer". He said there was no physical evidence tying McCarthy to the crime - only Rachelle Bond's "unbelievable" testimony. He called her a "monster" who made up a "web of lies" to blame McCarthy.
He was originally charged with first-degree murder, but the judge also allowed the jury to decide if he was guilty of second-degree murder or involuntary manslaughter at the prosecution's request. McCarthy will be sentenced June 28 at 10 a.m., the judge announced.
"He's a sick psychopath who got what he deserved", he said. The verdict can not bring Bella back, and can not change the fact that she was failed - colossally and tragically - by the adults in her life. Bond and others testified that McCarthy was into the occult, demons, astrology and reiki.