(CNN) — A shooting at a St. Louis business Thursday that left four people dead appears to be a murder-suicide, a police official said.
The unidentified owner of A K Home Health Care is believed to be the gunman, police said. The others appeared to be employees.
After a review of evidence, including a surveillance video, officers determined there had been an argument in the office of the business, Capt. Michael Sack told reporters.
“Shortly thereafter, gunshots are shown penetrating a wall inside of the business,” police said in a statement.