An essay it seems like, which wasn't included in the trial even:

> Crampton Brophy's how-to treatise detailed various options for committing an untraceable killing and professed a desire to avoid getting caught. Circuit Judge Christopher Ramras ultimately excluded the essay from the trial, noting it was published in 2011. A prosecutor, however, alluded to the essay's themes without naming it after Crampton Brophy took the stand.