A former US Marine wearing body armor shot four people, including a baby, mother, and grandmother, at a property outside Lakeland, Florida, early Sunday morning.

Four people were reported dead: a 40-year-old man, a 3-month-old baby and the baby's 33-year-old mother inside the home, and the baby's 62-year-old grandmother in a second house on the property, Polk County Sheriff Grady Judd said.

More photos from the scene of the quadruple homicide in #Lakeland https://t.co/D6DOaLLc7u pic.twitter.com/KNuIIqNhXh

— Polk County Sheriff 🚔 (@PolkCoSheriff) September 5, 2021

The suspect lives in Brandon, Florida, about 20 miles from where the shooting took place. According to Judd, there seems to be no connection between the suspect and the victims.

"We just know we had a madman with a lot of guns that shot and killed innocent people," he said.

Riley served four years in the Marines and later was discharged, but then he did another three years in the reserve, Judd said. He was deployed to Iraq in 2008 and Afghanistan in 2009-2010 as a designated sharpshooter, the sheriff added. 

The former Marine's partner mentioned that "he had PTSD. I've seen him depressed. I've never seen him violent".