Original sentence: In his 1997 book A Sniper In The Tower, Gary Lavergne, in a non-medical opinion, dismisses the tumor and Whitman's personal issues as sufficient causes for his actions, arguing he was in control of his actions and concluding he could not have successfully pleaded insanity had he lived
Edited sentence: In his 1997 book A Sniper In The Tower, Gary Lavergne, in sneering non-medical statements, dismisses the tumor and Whitman's personal issues as sufficient causes for his actions, arguing he was in control of his actions and concluding he could not have successfully pleaded insanity had he lived