A late‑night party on East Parish Street in Sandusky turned deadly on August 16, 2026, when gunfire broke out and 24‑year‑old Markier Mark S. Castile was critically wounded. Another man was also shot and survived. Both victims were taken first to Firelands Regional Medical Center and later transferred to MetroHealth Medical Center in Cleveland for higher‑level care.

Markier Castile died of his injuries on August 21, 2026, and the case is being investigated as a homicide. Large crowds at the party and later outside the hospital reportedly interfered with emergency response; several people were arrested for misconduct at an emergency, though those arrests were not directly tied to the shooting. No suspects have been publicly identified and no arrests have been announced.

Markier’s mother, Kirsten Alexander, has appealed to the community for help, saying many people were at the gathering yet no one has come forward. If anyone has information about that night or the people present at East Parish Street on August 16, contact the Sandusky Police Department.