It has all the makings of a country song: an escaped prisoner, his terminally ill mother, a Wal-Mart truck, NASCAR and a Nashville singer's tour bus.

Since Christopher Daniel Gay, 32, escaped from a prisoner transport van Sunday in South Carolina, police say, he has evaded a five-state manhunt by stealing a pickup, a big rig and a bus that belongs to singer Crystal Gayle.

Initially, police say, his motive for fleeing was simple. "I take it he was just trying to see his mom," said Michael Douglas, the police chief in Pleasant View, Tennessee, near the home where Gay's mother is dying of cancer.

He stole a pickup truck in South Carolina and made his way more than 300 miles northwest to Manchester, Tennessee, where he stole a Wal-Mart tractor-trailer filled with $300,000 worth of merchandise, police said.

On Tuesday, Gay got to within 50 yards of his mother's house, about 25 miles northwest of Nashville, but abandoned the Wal-Mart truck and fled into some woods, authorities said.

"What he done was wrong, but he knows his mama don't have long," his mother, Anna Shull, told The Tennessean this week. Efforts to contact Gay's family were unsuccessful Friday.

Authorities don't think Gay got to see his mother.

Since then, authorities believe he stole the bus belonging to Gayle -- the younger sister of Loretta Lynn, known for her long hair and hits such as "Don't It Make My Brown Eyes Blue."

Her husband and manager, Bill Gatzimos, couldn't immediately be reached for comment Friday, but he told WSMV-TV, "There's got to be a country song in having your bus stolen and taken for a joyride by a fugitive."