On Aug 24, 2015, at shortly before 8:00 am, Sergeant Peggy Vassallo was struck and killed by a vehicle while rendering aid to another driver at a traffic accident.

Sergeant Vassallo, who was in full uniform, was en route to work when she was involved in a two vehicle crash at the intersection of Lindbergh Blvd and Old Jamestown Rd, in St. Louis County. The other driver was complaining of neck pain, prompting Sergeant Vassallo to contact dispatchers to request medical assistance.

As she was speaking to dispatchers another vehicle entered the area at a high rate of speed. The vehicle swerved around Sergeant Vassallo's car and struck her, causing critical injuries. She was transported to a local hospital where she succumbed to her injuries several hours later.

Sergeant Vassallo had served with the Bellefontaine Neighbors Police Department for 15 years and had previously served with the St. Louis County Police Department for more than 13 years. She is survived by her husband, son, and two grandchildren. Sergeant Vassallo was a member of the Police Unity Tour. Interred: Sacred Heart Cemetery, Florissant, MO.