Investigations revealed the man was a known drug addict and former mental health patient, authorities say.

BBC: Switzerland gunman kills three in Daillon in Valais

Hope told police he would not "take the rap" for something he did not do and drug addict Richards denied the killing.

BBC: South East Wales

On the silver screen, Estrada had typically played the role of the oppressed or the underdog -- farmer, squatter, drug addict, rebel leader.

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He said many doctors were worried about taking on drug addict patients because they wrongly assumed they would be more violent and troublesome than other patients.

BBC: Addicts-only surgery launched

Two men being held in other cases gave them the name of an unemployed drug addict named David Ranta, who was eventually tracked down by Scarcella.

NPR: Retired Detective Defends Record In NYC Case

No physical evidence linked Ranta, an unemployed drug addict, to the crime and the diamond courier testified he didn't recognize Ranta as the bandit who tried to rob him.

WSJ: Questions linger in 1990 murder of rabbi in NYC

As an op ed by Baltimore Sun columnist Susan Reimer points out, Petraeus was not an alcoholic or a drug addict, and he did nothing unethical or illegal in his official capacity as CIA director.

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