BLAINE, Minn. - A 61-year-old father told investigators he shot his 38-year-old son multiple times after thinking he was on some kind of illicit substance, according to charges.

Joseph Theodorus Effertz called 911 around 7 a.m. on July 22 to report he had just shot his son. Blaine Police responded and found a man in the middle of the road in front of a residence on the 3200 block of 89th Curve.

The man was suffering from gunshot wounds and had a large amount of blood on his clothing and body. He was transported to Hennepin County Medical Center, where he later died.

A 61-year-old man is in custody after shooting his adult son in Blaine. Credit: Phil Duff, KARE 11

Officers approached the home and noted blood on the porch and throughout the residence. They met with Effertz, who admitted he shot his son multiple times.

According to the criminal complaint, Effertz said his son came into his bedroom looking for a videotape. Effertz didn't know which tape his son was talking about and thought his son may be on drugs. He said he was in his bed and reached for a loaded gun that was under a blanket near him.

Father shoots adult son in Blaine. July 22, 2016 Credit: Phil Duff, KARE 11

He told officers that he grabbed the gun and started firing at his son, as he was leaving the bedroom.

Effertz told officers he "kept shooting until I couldn't shoot anymore."

The son suffered three to four gunshot wounds, on his lower back, right thigh, right bicep and left forearm.

Effertz is charged with second-degree murder, which carries a maximum sentence of 40 years.