9/11 Firefighter Laid to Rest Nearly 15 Years After WTC Attacks

His family recently received vials of blood he donated years ago.

The remains of FDNY Safety Battalion Chief Lawrence Stack, who died at age 58, were never found, the FDNY said in a post on Facebook. For the past 15 years, Stack's family had been "holding out hope" that his remains would be recovered.

The FDNY announced that Stack's family recently discovered that the New York Blood Center still had vials of blood that Stack donated years ago.

"Now we can lay him to rest," said Michael Stack, Lawrence's son, who is currently an FDNY lieutenant.

A funeral mass for the slain fire chief was scheduled to take place at Saints Philip and James Roman Catholic Church in St. James, New York, the FDNY said.

His blood vials will be buried at Long Island's Calverton National Cemetary following the funeral, The Associated Press reported.

Stack is survived by his wife Theresa, and his sons FDNY Lt. Michael Stack and FDNY firefighter Brian Stack.