Editor’s note: As part of our 10th anniversary, Behind the Badge is sharing stories from our archives: This story is from May 13, 2016. Witnessing someone being murdered is traumatizing for anyone. Imagine if you were just 10 years old and witnessed that. Imagine if the person being murdered was a police officer. Late in the evening of June 5, 1969, 10-year old Louie Martinez was looking out his living room window, near 3rd and Raitt Streets in Santa Ana, when he saw a police officer outside. Like any 10-year old, Louie was curious what the officer was doing. From less…