Authorities say a suburban Philadelphia man who killed his ex-wife and then himself with a knife and chain saw wasn't under the influence of alcohol or drugs.

The Montgomery County coroner concluded after toxicology tests that 48-year-old Charles Peppelman had no drugs in his system and an amount of alcohol so small that it "is not worth mentioning."

Dr. Walter Hofman told The (Doylestown) Intelligencer (http://bit.ly/1J33uHK) that the man may have acted out of rage alone in the March 31 killing.

The coroner said earlier that Peppelman and 41-year-old Nicole Peppelman had gaping abdominal wounds. Nicole Peppelman was also choked and stabbed.

The couple's divorce was finalized more than a year earlier in January 2014.

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Information from: The Intelligencer, http://www.theintell.com