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Man Who Set Fire To Former Sex Partner's Corpse Arrested For Arson In San Francisco's Castro

SAN FRANCISCO (CBS SF) -- A man convicted in one of San Francisco's most bizarre crimes is under arrest after being tied to at least one recent arson case in the city's Castro neighborhood.

Police arrested David Diaz Wednesday night in the Castro after they say he set a fire behind a second story salon on Saturday.  Investigators say his boyfriend actually owns a bar on the first floor below that salon.

So far, Diaz is not connected to other arsons reported in the Castro and Noe Valley.  Police are investigating whether Diaz was involved in those earlier cases.

Diaz was released from jail recently after he was acquitted of murder, but convicted of involuntary manslaughter in the death of his sexual partner in 2011.

Diaz' public defender says Diaz accidentally killed his partner during a sex game by choking him.

Prosecutors say Diaz set fire to the man's body to try to cover it up.

The murder case only wrapped up last summer, but with only an involuntary manslaughter conviction, Diaz was sentenced to time served, and has been free since September.

The public defender that represented Diaz in the murder case will now represent him in the arson case.

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