Banker's son, 22, 'drowns alcoholic dad in baptism-style EXORCISM

Jack Callahan, 22, is pictured on his father Scott's left alongside his mother Wendy and his two brothers Will and Charlie in 2016. The parents were divorced when Jack allegedly murdered his father in June 2021

A Massachusetts court heard the trial of Jack Callahan, 22, accused of drowning his father Scott, 57, in what he believed to be an 'exorcism' to rid his father of a demon he saw in his eyes.

The incident occurred in June 2021 outside Duxbury, about 30 miles from Boston, where Scott was found floating in a pond by police.

Jack Callahan, 22, has gone on trial for the murder of his father Scott during an 'exorcism'

Jack claimed his father was possessed by a demon named 'Dirty Dan' and thought baptism could expel the demon.

According to reports, Jack and his father were returning from a bar in Boston when his mother, Wendy, refused to let Scott into their home. Jack then asked the cab driver to stop by the pond.

Scott Callahan’s obituary reported that he was the Senior Vice President of Texas Capital Bank, and had an ‘extensive career in finance’

Jack confessed to police that he submerged his father's head multiple times in the water, stating he left him there to choose between heaven and hell.

Scott, a Senior Vice President at Texas Capital Bank, had been receiving treatment for alcoholism before heading to the bar in Boston.

Police found Scott Callahan (pictured with a unnamed woman) dead in a pond outside Duxbury, Massachusetts in July 2021

The altercation between Jack and his father escalated when Jack asked the Uber driver to stop, leading to Scott allegedly attacking Jack.

Jack's mother noticed his return home in wet clothes around 2 am and called the police about his mental state and Scott's disappearance.

Scott Callahan (pictured in an undated photo from his obituary page) was a heavy drinker. His son had gone to collect him from a bar on the night of the alleged killing

When found by police, Jack was distressed and hyperventilating, mentioning he had blacked out during the incident.

Scott was pronounced dead after CPR attempts at Beth Israel Deaconess Hospital.

Jack pleaded not guilty at his first hearing and was sent for a mental health evaluation.

His trial for murder is expected to last 10 days.

Wendy Callahan with her children Jack, Will and Charlie a year before Scott's death