The man charged with the killing of a young Tamworth mother and leaving her body lying next to her baby in bed was a friend of his alleged victim.

Teah Luckwell's body was discovered beside her one-year-old daughter in her South Tamworth unit in regional New South Wales on the night of March 28.

Emergency services were alerted by a neighbour about 9.40pm on reports of a robbery and Ms Luckwell's daughter was taken to hospital for a check, NSW Police said at the time.

Teah Luckwell was killed at her South Tamworth home on March 28. Picture: Supplied (Nine)

The toddler is now being looked after by her grandmother.

Afterwards, detectives from the State Crime Command’s Homicide Squad and Oxley Police District established Strike Force Penola to investigate the circumstances surrounding Ms Luckwell's death.

On April 5, three men aged 26, 27 and 40 were charged with break-in offences.

Teah Luckwell's body was found next to her unharmed daughter. Picture: Facebook (Facebook)

Following a seven-week investigation, 27-year-old Jesse Leigh Green was arrested at Silverwater Correctional Complex yesterday and charged with murder.

Detectives allege Ms Luckwell was killed in the early hours of the morning but her body was not found for 15 hours.

It is understood that Mr Green was not in a relationship with Ms Luckwell, but had visited her house as a friend and would have known her baby daughter.

The body of 22-year-old Teah Luckwell was found inside her South Tamworth home on March 28. Picture: Facebook (Facebook)

Devastated friends have since posted online tributes to the 22-year-old, with the local community now preparing a weekend fundraiser for her family.

"Please help us to raise as much as we can for Teah's little girl," an organiser said on Facebook.

Homicide Squad Commander, Detective Superintendent Scott Cook, congratulated police on their investigation.

It is understood Ms Luckwell suffered a brutal death at the hands of a friend. Picture: Facebook (Facebook)

“The cooperation between Homicide and Oxley detectives has produced an outstanding result for the local community,” Det Supt Cook said.

“The Homicide Squad will continue to engage experienced local detectives in their investigations, wherever possible.

“Their local knowledge and high-level investigative skills are invaluable in providing justice for victims and their families,” Det Supt Cook said.

Oxley Police District Commander, Superintendent Fred Trench, thanked the community for their assistance throughout the investigation.

“While Tamworth is a large regional centre, it’s during investigations like this, that we realise how much support we have in our community,” Supt Trench said.

"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.

“Investigators received significant information and assistance from day one, which has provided prompt results and reaffirms our commitment to keeping the community safe.

The two other men arrested over the break-and-enters - aged 26 and 40 - were also to appear before Tamworth Local Court today.