Published: Sep 29, 2010 3:39 PM EDT
Updated: Sep 29, 2010 12:39 PM EDT

MULBERRY, Fla. (AP) - A 19-year-old woman killed in a Polk County crash that sent five others to the hospital has been identified.

The sheriff's office says Heather Michelle Layton was a passenger in a Ford Explorer that crashed Tuesday morning. The driver of the car and two other passengers are listed in critical condition in the hospital. A fourth passenger is in stable condition.

The driver of the second car involved in the crash is in serious condition.

Authorities say the driver of the Explorer, 19-year-old Timothy Hammock, crossed a double yellow line and passed a car that was in front of him. When Hammock got in the other lane, the Explorer fishtailed out of control and entered the other lane, crashing head-on into the pickup truck.

The case remains under investigation.