Although the warrant was based on a heroin purchase that never happened, Art Acevedo says, there was other, unmentioned evidence that would have justified a search.
The Houston Police Officers' Union is no longer covering the legal fees of Gerald Goines, who faces two murder charges.
While the narcotics officers charged with murder and evidence tampering were bad eggs, Art Acevedo says, their colleagues acted "in good faith."
Gerald Goines justified the raid, which killed a middle-aged couple, based on a heroin purchase that apparently never happened.
Evidence from the scene of the disastrous raid seems to contradict the official account.
Contradictory responses to a request for autopsy reports illustrate how law enforcement agencies take advantage of a broad exception to the state's public records law.
The physical evidence at the scene seems inconsistent with the story told by the officers who conducted the no-knock drug raid.
Dennis Tuttle and his wife, Rhogena Nicholas, who was shot twice, were pronounced dead shortly after police invaded their home based on a "controlled buy" that never happened.
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