Missing: Joshua James Hancock, Student at Pittsburg State University (Kansas)

OLATHE, Kan. (CBS/AP) Police in northeastern Kansas are searching for 21-year-old Joshua James Hancock who disappeared Aug. 5 after going out to a bar with co-workers.

The Pittsburg State University student used his debit card around 1:20 a.m. at the Great Mall of the Great Plains in Olathe, police say.

Gary Stone, chief detective at the Linn County sheriff's office, told KansasCity.com that Hancock's 1990 light blue Lincoln Town Car, license number XFM 412 had not been located.

According to WDAF-TV, Hancock's parents, whom he lived with in the Linn County town of Parker, fear foul play in his disappearance due to his trusting nature.

Hancock is described as 6 feet 5 inches tall, and weighs 165 pounds.

Hancock is a very responsible young man who was supposed to enter the National Guard this past weekend, says LostnMissing.com.

Family and friends of Joshua Hancock ask anyone with information to call the Linn County Sheriff's Office at 913-795-2665, the Anonymous TIPS Hotline at 816-474-TIPS, or your local police.