Blood on the tracks: Were 50 Irish immigrants murdered in Philadelphia in 1832?

More than 50 Irish immigrants may have been murdered in 1832 in Philadelphia. Bette Browne reports on the excavation of a mass grave to find out what happened in the forgotten massacre

On a stretch of US railroad near Philadelphia lies a dark secret from America’s past, entombed with the remains of over 50 Irish immigrants.

It hints at cruelty, betrayal and unspeakable violence but now a breakthrough could mean the long search for answers may be reaching the endgame and the chilling conclusion that many of the immigrants were killed in a massacre.