On June 5, 2024, brothers John Austwick, 60, and Marc Austwick, 63, were found dead outside a house fire on Park Avenue West in Highland Park, Illinois. The Lake County Coroner’s Office determined both men died from multiple gunshot wounds; the fire did not cause their deaths. Responding firefighters discovered the house heavily involved in flames and the two brothers deceased in the yard. No other victims were located.

Investigators say the brothers had gone to the property, owned by their mother Phyllis Austwick who died May 31, 2024, to discuss the estate with their youngest brother, Jeffrey S. Austwick, 54. Authorities allege Jeffrey shot John and Marc, set the house on fire, and fled in his vehicle. A nationwide arrest warrant was issued June 5; Jeffrey Austwick was arrested June 7 in St. Louis, Missouri, and remained in custody in Missouri pending an initial court hearing.

The Lake County Major Crimes Task Force, Highland Park Police, Illinois State Fire Marshal, ATF and U.S. Marshals were involved. Authorities described the killings as appearing isolated with no known threat to the community. If anyone knew John or Marc, or has information about that early morning on June 5, what can you share?