Liao Mach , four , and his grandmother Mai Mach , 60 , were murdered . Chinese tourist Cai Xia Alistair , 45 , is charged with their murder . Fundraising page for victims' family has raised almost $ 50,000 in one week . The funds will help pay for their funeral and be directed to a 'good cause ' Alistair had allegedly been having an affair with boy 's grandfather , Brian Mach . Police allege Alistair stabbed Liao in his sleep while Mr Mach was gagged .
Alistair Mach , four , and his grandmother Mai Mach , 60 , were murdered . Chinese tourist Cai Xia Liao , 45 , is charged with their murder . Fundraising page for victims' family has raised almost $ 50,000 in one week . The funds will help pay for their funeral and be directed to a 'good cause ' Liao had allegedly been having an affair with boy 's grandfather , Brian Mach . Police allege Liao stabbed Alistair in his sleep while Mr Mach was gagged .