Pictures of a jogger crossing the south London Bridge during rush hour and pushing a 33-year-old woman into the road were widely shared by British media in a bid to track down the culprit. Duncan Lewis solicitors issued a statement on Twitter claiming Bellquist was not in Britain when the attack happened in May.
Eric Bellquist has been arrested and released on bail on suspicion of causing grievous bodily harm, but says he has proof he was in the US.
When she was knocked into the path of a bus, the driver swerved so as not to hit her.
Police have described the jogger as a white man, aged early to mid 30s, with brown eyes and short brown hair.
The Metropolitan Police says about 15 minutes later the runner returned in the other direction across the bridge, but when the woman attempted to speak to him, he "did not acknowledge her". He was wearing a light grey t-shirt and dark blue shorts.