Tucked into Tucson's Barrio Viejo is an unassuming broken-down adobe wall adorned with flowers, candles and little pieces of paper containing people's deepest wishes.

The shrine to El Tiradito serves not only as a landmark to a vicious and titillating murder that happened in the late 1800s but as a symbol in this predominantly Mexican-American neighborhood.

In this week's episode of Valley 101, a podcast by The Arizona Republic and azcentral.com, we share the true-crime story behind what could be the only shrine to a sinner and its role in Mexican-American folklore.

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