Cherry Valley Road

Leanne See-Garcia’s son found a skull behind their mailbox in Bull Valley, Ill., while waiting for a bus. Police later found a second skull nearby. (Credit: CBS/Leanne See-Garcia)

2 Human Skulls Found In Bull Valley, Ill.

Two human skulls were found Tuesday in town of Bull Valley, near Crystal Lake, and authorities are trying to determine their source.

CBS Chicago–01/25/2012