allegedly
adverb
[ əˈlɛdʒɪdli ]
• used to convey that something is claimed to be the case or have taken place, although there is no proof.
• "he was allegedly a leading participant in the coup attempt"
Similar:
reportedly,
supposedly,
reputedly,
purportedly,
ostensibly,
apparently,
by all accounts,
so the story goes,
putatively,
presumedly,
presumably,
assumedly,
declaredly,
avowedly,
be accused of being/doing,
be alleged to be/have,
be said to be/have,
be rumoured to be/have,
