It was because of a burrito.
KOAT-TV reports a guard smuggled in a tortilla-wrapped surprise for an inmate and the prisoner was caught in the act of enjoying it, which authorities said raised a ruckus among the other inmates.
Prison authorities even speculated whether the guard and inmate were experimenting with attempting to use a burrito to smuggle in contraband, but nothing much was found except the usual stuff found in a burrito (see above).
Warden Joe Chavez says in 20 plus years, it's the first time the facility has been locked down over a burrito.
That's reassuring, I guess.
The lockdown was expected to be lifted Wednesday. The burrito-bearing guard was fired.