The man charged with the brutal murder of a young Tamworth mother was a friend of his alleged victim and knew her baby girl.
Teah Luckwell's body was discovered beside her one-year-old daughter in the Tamworth unit on the night of March 28.
Emergency services were alerted by a neighbour about 9.40pm, NSW Police said at the time, with Ms Luckwell's daughter taken to hospital for a check.
The toddler is now being looked after by her grandmother.
A 27-year-old was arrested on Tuesday and charged with Ms Luckwell's murder.
The man - who was charged at Silverwater Correctional Complex where he was already in custody in relation to a series of break-ins around Tamworth - is due to appear in court via video link on Wednesday.
The 27-year-old was arrested in relation to the robberies, along with two other men, a week after Ms Luckwell's body was discovered.
AAP understands he was not in a relationship with the victim but had visited her house as a friend and would have known her baby daughter.
Devastated friends have posted online tributes to the "forever young" 22-year-old.
The local community is preparing for a weekend fundraiser for Ms Luckwell's family.
"Please help us to raise as much as we can for Teah's little girl," an organiser said on Facebook.
Superintendent Fred Trench says information provided by the community in the wake of Ms Luckwell's death played a "significant role" in the breakthrough this week.
"We got a lot of information from the public and that, combined with other investigative techniques, lead to this arrest yesterday," he told reporters in Tamworth.
Detectives had been working on the case round-the-clock for seven weeks, Supt Trench said, and Ms Luckwell's family were relieved an arrest had been made.
"Each murder is traumatic. But the circumstances in this one - such a young lady (and) her body found in the company of her 13-month-old daughter - certainly added some extra trauma to the investigation," he said.
The two other men arrested over the break-and-enters - aged 26 and 40 - were also to appear before Tamworth Local Court on Wednesday.