Lee got into an argument Thursday with the boy's uncle, who lives with Lee's children.
The uncle, Jerome Holloway, tell WSBT-TV (http://bit.ly/16Vw4vt ) he kept insisting Lee provide more support for the children when Lee arrived at the house.
Police say the men were arguing outside when Lee pulled out a gun and fired a shot, striking his son, who was standing on the home's porch.
Relatives say the bullet broke the boy's leg but did not require surgery. The boy's leg was put in a cast.