Boyfriend admits murdering his dental nurse girlfriend whose body was found in a Melbourne alleyway

• Christopher Allen Bell, 33, charged with the murder of Natalina Angok, 32
• Her body was found early on April 24, 2019, at the corner of a dead-end laneway 
• Bell pleaded not guilty in December but changed his plea on Wednesday 
• Believed he is schizophrenic who was released from mental facility a week prior

The boyfriend of a woman found dead in a laneway in Melbourne's Chinatown last year has pleaded guilty to murdering her.

Christopher Allen Bell, 33, pleaded guilty to killing Natalina Angok when he appeared via video link in the Supreme Court on Wednesday.

The 32-year-old's body was found by a tradie at the intersection of Little Bourke Street and Celestial Avenue in the early hours of April 24 last year.

Christopher Allen Bell, 32 (pictured), on Wednesday pleaded guilty to killing Ms Angok last year

Detectives quickly declared her death suspicious after a passerby found her lifeless with her handbag and cracked phone beside her.

Bell showed no expression on his face as his indictment was read out for the Supreme Court, The Age reported.

The guilty plea comes months after the 33-year-old pleaded not-guilty to Ms Angok's murder in December.

Defence lawyer Rohan Lawrence said Bell was waiting to have a psychological assessment before an upcoming plea hearing on September 16.

An earlier hearing heard the 33-year-old suffered from schizophrenia but had been un-medicated long before the alleged attack.

Bell had been released from a mental inpatient facility just a week before Ms Angok was found dead, and had only been there for a week.

The 32-year-old's body was found by a tradie at the intersection of Little Bourke Street and Celestial Avenue in the early hours of April 24 last year 

Shortly after her death Ms Angok's sister, Helena, told the media Bell had been dating her sister.

Ms Angok and Bell were pictured together at the Exford Hotel on Russell Street about 2am on April 24.

Bell is alleged to have gone to Crown casino after the young woman's killing, the court previously heard.  

Defence lawyer Rohan Lawrence said Bell was waiting to have a psychological assessment before an upcoming plea hearing on September 16 

Natalina was one of five siblings and lived in Highton, Geelong, about 75kms south-west of Melbourne.

She worked as a warehouse packager and was described as 'down-to-earth'.

'My sister is gone and when I think about it, I think this is not true,' Ms Angok said of her sister's death at the time.

'She loved everybody, even if someone did something bad to her, she would just talk and laugh with them.'