Attorneys for a former student accused of killing 17 people at a Florida high school should not be allowed to use any failures by his therapists, school officials or campus security guards as mitigating factors during the death penalty phase of his trial if he is convicted, a prosecutor told a judge.

Prosecutor Jeff Marcus told Circuit Judge Elizabeth Scherer that Nikolas Cruz’s attorneys should not be allowed to argue that failures by others alleviate his responsibility for the Feb. 14, 2018, shootings at Marjory Stoneman Douglas High School in Parkland.