New tech, fresh eyes, and years of persistence changed everything for two Arizona cold cases.

Sometimes cold cases are forgotten about for decades, or even centuries! Here's a few really cold cases that were eventually solved by Science! Join Stefan Chin for a thrilling new episode of SciShow.

For decades, these cases haunted investigators, tormented families, and kept communities on edge. Killers walked free, victims went unidentified, and justice seemed like a distant dream. Then ...

The 1987 killing of NAU student Ina Langstaff is no longer a mystery. Police say new forensic testing helped solve the ...