A third person has been charged over the alleged murder of a man in Greenfields.
Police confirming on Wednesday, a 48-year-old Barragup woman has also been charged with the alleged murder of Joshua Standring.
Karen Marie Conley appeared in the Perth Magistrates Court today.
It is understood Ms Conley was the alleged victim's girlfriend.
Mr Standring was allegedly assaulted at a home on Renison Drive about 1.45am on Sunday.
Despite the efforts of police and paramedics the 41-year-old could not be saved.
Shane Edward Peirce, 54, and Ross Edward Weir, 51, both from Barragup, have each been charged with his alleged murder.
They appeared in the Perth Magistrates Court on Tuesday and were remanded in custody to appear in the Stirling Gardens Magistrates Court on October 30.
Ms Conley was remanded in custody and will also appear in the Stirling Gardens Magistrates Court on October 30.
Mission Australia celebrates 25 years of supporting young people through Mandurah Reconnect program
'Mad Eagles fan' wins $6 million Lotto prize
Mandurah woman loses everything in house fire
Gift card scams surge past $1 million prompting urgent warning from Consumer Protection
Secret Harbour by-election attracts record 16 candidates
Major party candidates locked-in for looming Secret Harbour by-election
Comet Bay Primary to offer full-time kindy from 2027
North Dandalup crash claims life of driver
Date set for Mandurah's Town Ward Extraordinary Election