A Texas jury convicted Eddie Routh on Tuesday in the murder of the man who inspired the movie American Sniper, Chris Kyle. Routh’s lawyers had argued that the ex-Marine should be acquitted because, they asserted, he was suffering from PTSD at the time of the shooting.

Regardless of whether Routh was impaired when the murder occurred, his lawyers failed to present their case in a way that sways juries. An analysis of major court cases over the past 40 years in which post-traumatic stress disorder was invoked—from murders to assaults to drug crimes—reveals that juries seem to be more sympathetic to PTSD when defendants say they were “dissociated”—that is, unaware of their actions or convinced that there was an imminent threat. This was not the direction Routh’s lawyers pursued.

Instead, the lawyers described a man who was clearly mentally disturbed, but not necessarily dissociated, when he pulled the trigger and killed Kyle. The jury was not moved.

Here’s a breakdown of the 30 cases since 1978 that invoked the PTSD defense: