The death toll from last month’s collapse of a garment building in Bangladesh has now reached at least 645. The figure was released earlier today in the ongoing search of the building’s rubble. The Dhaka collapse marked the worst accident in the garment industry’s history. Bangladeshi police have acknowledged for the first time they are investigating murder charges against the building’s owner, Sohel Rana, following a complaint brought by the wife of a dead worker. Rana and eight others have already been arrested on other charges. On Sunday, an architect who worked on the building’s initial construction said it had been designed to hold a shopping mall, not as a site for heavy industrial operations.