Cops are praising the heroism of a bystander who intervened and stopped a sexual assault alongside a highway last week.

It happened this past Thursday along Interstate 295 in Mount Laurel at about 3 p.m., the New Jersey State Police said.

Police said Donald Cramer Jr., 52, of Philadelphia, was spotted dragging a woman into the woods off the side of a ramp exiting the interstate northbound to Route 73.

Cramer also brandished a knife and threatened to kill the woman, according to an affidavit of probable cause filed in court.

John Bishop pulled over and ran to the woods to aid her, the State Police said in a statement about the good Samaritan’s efforts.

Bishop told the Burlington County Times Monday that he was headed to pick up some pool chemicals when he saw something on the road side and heard a scream. He pulled over in his pickup.

“I wanted to get him up near the road, so I drug him by the arm and neck up the hill and threw him over the guardrail onto Route 73,” Bishop, of Burlington Township, told the newspaper.

Mount Laurel officers arrived and arrested Cramer, who was charged with kidnapping, criminal attempted sexual assault, aggravated assault, robbery, possession of a weapon for an unlawful purpose, terrorist threats and criminal restraint.

Cramer is also charged with resisting arrest after kicking and spitting at officers trying to load him into a patrol car. He is in the Burlington County Jail before a detention hearing.

The woman was taken to a hospital with non-life-threatening injuries.

Cramer may be a suspect in more sexual assaults. Anyone with more information should contact State Police Detective Craig McCoy at the Bordentown Station at 609-298-1171. Anonymous tips will be accepted.

-This post has been updated to reflect that Mount Laurel police officers made the arrest.

Joe Brandt can be reached at jbrandt@njadvancemedia.com. Follow him on Twitter @JBrandt_NJ. Find NJ.com on Facebook.

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