Emotional neighbors created a memorial on the door steps of the couple's home.
Neighbor Robert Antu says, "As far as I'm concerned, that man is a good man. I can't believe what went down."
TIMELINE: HPD officers shot serving narcotics warrant
Antu has lived across the street from Tuttle for 30 years and says Tuttle was on medication for lingering effects of serving in the military.
Houston police say an investigation was sparked by concerns from other neighbors.
They sent in undercover officers and they were able to make two purchases of black tar heroin from the home.
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Police say the search warrant was executed with nine narcotics officers and at least six other uniformed police.
HPD Special Investigations Unit, HPD Internal Affairs Division and the Harris County District Attorney's Office are investigating the shooting.
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