Authorities in Pennsylvania have taken a second person of interest into custody in connection with the deaths of four men who went missing outside Philadelphia last week. The unidentified person was detained in northeast Philadelphia late Thursday, according to Fox 29. The news comes after Cosmo DiNardo, 20, allegedly confessed to being involved in the killing of the four men as part of a plea deal in which he’d be spared the death penalty, the Associated Press reported. A source cited by the AP said earlier that DiNardo had a co-conspirator who was also involved in the shooting of three of the young men, though no further details have been released. Police had spent the last several days searching a farm in Solebury Township for any traces of the four missing men. They found human remains in the area Wednesday night and deemed the case a homicide.