Why was Mary Surratt not photographed after her arrest?

[brtmchl]

The fact that the government didn't consider her a prime suspect at the time as John and Barry stated makes the most sense to me.

Could there have been fear, that taking the photograph of the first potential woman to be executed by the government also garner some sort of sympathy from the general public?

I would imagine that once they decided that Mary was involved and put her on trial, as a prime suspect, the demand for a photograph would have been high.