Closing Arguments Due in Deutsche Bank Trial

The manslaughter trial surrounding a blaze that killed two firefighters in a condemned ground zero bank tower is wrapping up.

Closing arguments are due to start Tuesday in the case against three construction-company supervisors and a firm that employed two of them.

The former Deutsche Bank building was contaminated with toxic debris in the Sept. 11 attacks. It was being torn down when a fire ripped through nine stories in August 2007.

Prosecutors say Mitchel Alvo, Salvatore DePaola and Jeffrey Melofchik knew a crucial firefighting water pipe had broken months before, hadn't fixed it and had even taken steps to conceal it.

The men say they didn't realize the pipe's importance, and that a host of other hazards and regulatory oversights fed the fire.