The St. Tammany Parish Sheriff’s Office has arrested 31-year-old Derick Joseph Fehn for a homicide investigators say stems from a long-standing feud between his wife and her sister.
According to the sheriff’s office, shortly after 3 p.m. Sunday, STPSO deputies were dispatched to the 2000 block of Old Spanish Trail near Slidell in reference to a shooting.
Detectives say Fehn drove to the area Sunday afternoon after a days-long argument between the two sisters.
As he drove up to the sister’s home on Sunday, the sister, the sister’s boyfriend, and their small child exited the home and walked toward Fehn’s vehicle.
At which time, investigators believe Fehn pulled out a gun and fired upon the three individuals before driving off.
The sister and the child were not injured, but the sister’s 30-year-old boyfriend sustained gunshot wounds. He was transported by EMS to the hospital, where he died from his injuries.
Fehn was later found and arrested by deputies Monday night. He faces one count of Second-degree Murder, two counts of Attempted First-degree Murder, and one count of Obstruction of Justice.