MILWAUKEE (CBS 58) -- A 15-year-old was found dead after being shot to death and left in a Milwaukee alley. 

Now Crime Stoppers and investigators in this case need help to find the killer.

It was Friday the 13th when police say people driving by called to report something in the alley. When they got there, they found 15-year-old Jason Eggars dead -- he'd been shot in the head.

Police believe his body had been outside near the 2600 block of North 18th Street all night. All they found at the scene was one 45 caliber casing. There were no witnesses, no video and nothing else to go on.

"One 45 caliber casing, that's a rather large casing," said Milwaukee Police Captain Craig Sarnow. "And casings are often times like fingerprints. They do lead us in certain directions. In this case, it did not produce any leads for us. That's why we need the public's help, to come forward and provide us with something."

You can come forward anonymously by calling 414-224 TIPS. Your tip could lead to up to a $1,000 reward.