A Weymouth man who was arrested after police said he hit a pedestrian while driving under the influence of drugs and alcohol has been held without bail. 

Thomas Mohan, 51, was arraigned at South Shore Hospital Wednesday afternoon. 

Mohan pleaded not guilty.

The crash happened in front of Monahan’s Marine on Washington Street/Route 53 at around 12:15 p.m. 

Peter Monahan said one of his employees was pulling out of the parking lot and saw a van barreling down the breakdown lane. 

"He tried to put it in reverse but he got it," said Monahan. Police said the crash sent one of the vehicles into a 39-year-old man who was walking by. The man was taken to South Shore Hospital with life-threatening injuries.

"The man was obviously intoxicated," said Monahan.

Mohan and the other driver were also taken to the hospital, where Mohan was arrested.

Mohan was charged with operating under the influence of alcohol, causing serious bodily injury, operating under the influence of drugs causing serious bodily injury, negligent operation of a motor vehicle and failing to keep to marked lanes. 

Assistant Norfolk District Attorney Michael Pirrello asked a judge to revoke Mohan’s bail on a Hingham District Court case involving the violation of a restraining order. That motion was upheld, meaning Mohan will be held without bail for 90 days. 

Mohan’s mother Claire said she is very worried about the man who was hit and that her son is depressed and going through a hard time.

Mohan will appear in court on March 22.

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