An attempt to put a group home worker's name on Manitoba's child abuse registry was based on charges stemming from a "seriously flawed investigation," a Manitoba judge says.

Court of King's Bench Justice Kaye Dunlop said in a June ruling it's "overwhelmingly clear" the man could not have abused a girl at the group home he worked at in 2015.

The man, who was in his 50s at the time and is identified in the ruling only as "M.G.," was arrested in October 2017 and charged with sexual assault and sexua…