After the controversy of a Chinese scientist who was involved in editing the genomes of twin girls, the country puts forth tighter guidelines.

Documents about the experiment challenge a Chinese government investigation’s finding that He Jiankui mostly acted alone.

Multiple researchers were aware of He Jiankui’s clinical trial before the news became public in November.

He Jiankui could face charges after an investigation finds he used techniques prohibited in China to edit the genes of twin girls.

Since He Jiankui presented his results at last week’s gene editing summit, researchers have raised concerns about his protocol, calling the procedure “amateurish” and “unconscionable.”

Despite a premature and ethically sketchy claim of genome editing in twin girls, an outright prohibition could blunt promising, responsible progress.

He Jiankui, who reportedly edited the genomes of two babies already, broke the news at a conference in Hong Kong.

The college has opened an investigation into Michael Deem’s involvement.

He Jiankui says he has successfully used CRISPR-Cas9 to tweak the genes of twins born earlier this month. Some independent experts are dubious.