Why you're not Officer Friendly anymore, Reason #399:

You're lying, murdering bastards who aren't fit to hold that badge you're hiding behind.
...Detective Patrick Hobbs, a self-described narcotics expert who claimed he "smelled the strong odor of chemicals" downwind from the house after being tipped off to illegal activity from an anonymous informant, spearheaded the investigation.
...
Deputies approached the house, and what happened next is where things get murky. The deputies said they announced their presence upon entering and were met in the hallway by the 80-year-old man, wielding a gun and stumbling towards them. The deputies later changed the story when the massive bloodstains on Mallory's mattress indicated to investigators that he'd most likely been in bed at the time of the shooting. Investigators also found that an audio recording of the incident revealed a discrepancy in the deputies' original narrative:

Before listening to the audio recording, [Sgt. John] Bones believed that he told Mallory to "Drop the gun" prior to the shooting. The recording revealed, however, that his commands to "Drop the gun" occurred immediately after the shooting.

When it was all over, Eugene Mallory died of six gunshot wounds from Sgt. John Bones' MP-5 9mm submachine gun. When a coroner arrived, he found the loaded .22 caliber pistol the two deputies claimed Mallory had pointed at them on the bedside table.
Mallory had not fired a single shot. The raid turned up no evidence of methamphetamine on the property.
So: the justification for this raid was "I smelled chemicals", they killed a man in his home, LIED ABOUT WHAT HAPPENED, and found NOT ONE DAMNED THING they claimed to be looking for.

And from the LA County SO?
The Los Angeles County Sheriff's Department declined multiple requests to comment on this story.
Of course they did.  They haven't figured out yet what excuse to use to cover for the murder and lies.