LOUISVILLE, Ky. — The 25-year-old bank employee who killed five and wounded eight others in his workplace with an AR-15 before being shot dead by police had mental health issues that were "actively being addressed," according to a statement released by the shooter's family.

Connor Sturgeon, a low-level employee at Old National Bank in downtown Louisville, targeted his coworkers in a livestreamed mass shooting on Monday, April 10. Five were killed and eight others, including two Louisville Metro police officers, were wounded in the massacre.

In the statement released through their lawyer, the Sturgeon family expressed "sorrow, anguish, and horror" after their son's actions sent shockwaves through the Louisville community. "We pray for everyone traumatized by his senseless acts of violence and are deeply grateful for the bravery and heroism of the Louisville Metropolitan Police Department," their statement reads.

They also revealed that they were aware of their son's mental health challenges.

"While Connor, like many of his contemporaries, had mental health challenges which we, as a family, were actively addressing, there were never any warning signs or indications he was capable of this shocking act," the family said.

The Sturgeons said they'll continue cooperating fully with police and the ongoing investigation into the shooting. You can read their full statement below:

"No words can express our sorrow, anguish, and horror at the unthinkable harm our son Connor inflicted on innocent people, their families, and the entire Louisville community. We mourn their loss and that of our son, Connor. We pray for everyone traumatized by his senseless acts of violence and are deeply grateful for the bravery and heroism of the Louisville Metropolitan Police Department. While Connor, like many of his contemporaries, had mental health challenges which we, as a family, were actively addressing, there were never any warning signs or indications he was capable of this shocking act. While we have many unanswered questions, we will continue to cooperate fully with law enforcement officials and do all we can to aid everyone in understanding why and how this happened."

Louisville Metro Police Department Chief Jacquelyn Gwinn-Villaroel said at a news conference that Sturgeon bought the AR-15 rifle used in the shooting on April 4 at a local dealership.

Body camera footage released Tuesday evening showed how LMPD officers engaged, and eventually neutralized, Sturgeon in a standoff. Louisville is holding a community vigil at the Muhammad Ali Center Wednesday at 5 p.m. ET, and several churches are hosting citywide vigils through the evening.