ATLANTA (AP) — U.S. Attorney's officials say a metro Atlanta school bus driver has been sentenced to 15 years in prison on child pornography charges.

Authorities said Monday that 57-year-old Stanley Keith Johnson of Mableton ordered about 180 DVDs from a foreign company between November 2010 and April 2011 featuring nude boys who were between 8 and 14 years old.

Investigators say a forensic examination of Johnson's computer revealed that the former Cobb County school bus driver and supervisor produced child pornography on a computer issued by the school district.

The pornography featured an 8-year-old boy Johnson befriended at church.

Authorities have said Johnson volunteered with the church's youth group and took interest in boys who didn't have father figures.

Johnson is ordered to serve a lifetime of supervised release after his sentence.