DULUTH, Minn. (AP) - A Michigan woman has pleaded guilty to murder in the fatal stabbing of a Duluth woman, but says she wouldn't have done it if she wasn't under the influence of synthetic drugs.

Reports say 29-year-old Nicole Leone Revello of Marquette, Mich., entered her guilty plea Friday in Duluth. She agreed to a sentence of about 30 years, and will be formally sentenced in September.

Revello admitted she stabbed 46-year-old Lisa Kay Davis on June 2. Revello's attorney, Brent Olson, says his client is sorry and wanted to take responsibility for what she did. Olson says Revello is a different person when she is not under the influence of synthetic drugs.

Prosecutors say Revello intentionally stabbed Davis in the back after the two argued earlier that day.

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