A Hawaii jury has convicted an adoption advocate of sexually assaulting two girls.

The Honolulu Star-Advertiser (http://ow.ly/HukUv ) reports that jurors deliberated for less than three hours Friday before finding Louis Martinez guilty.

Martinez is the former executive director of an organization that encourages adoption of foster children.

He was charged last year of attempted sexual assault involving a girl who was 11 years old in 2011. In 2013, he was charged with sexually assaulting a 16-year-old girl. Prosecutors say he assaulted her in her sleep after he gave her three to five shots of hard liquor.

Martinez opened Heart Gallery Hawaii in 2005 under the name David Louis. That's the name he used when he authored a book about his experiences growing up in foster care.

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Information from: Honolulu Star-Advertiser, http://www.staradvertiser.com