Gone are the days of searching under your kid's mattress or sock drawer. Seems there's a new high-tech way of finding out whether your child uses not-quite-legal substances.

A San Diego company now sells a mail-in drug test. All you have to do is pluck a hair from your child's head and send it to the company's lab. Within 24 to 48 hours, your beloved son or daughter may have some serious explaining to do.

The test, called Hair Confirm Prescription, tests for one dozen illegal or prescription drugs commonly abused by teens. It costs $89.99

Confirm BioSciences, the company that sells the kit, bills the test as a way parents can regain control. 

"Hair Confirm is designed to help parents take a proactive role in preventing their children’s illegal and prescription drug use," said Zeynep Ilgaz, CEO of Confirm BioSciences. "Talking with your child about drugs and taking preventive measures like hair drug testing can be a significant factor in preventing substance abuse."

No word yet on whether Confirm is developing a trust-detection kit.