Matthew Hertgen has been in custody since his arrest on Feb. 22, after allegedly attacking and killing Joseph Hertgen in the family's Princeton residence.
Matthew Hertgen is accused of brutally killing his brother, Joseph Hertgen, in Princeton. A relative told police he has struggled with "terrifying visions."
Police in Quarrytown, Pa said John Francis McCarthy IV of Mantoloking approached two of their officers on Feb. 15 and said he was working undercover for the U.S. Attorney's Office.