"It is unclear as to why Mr. Reinhart's vehicle was found in Portsmouth," Portsmouth police Lt. Michael Maloney is quoted as saying in The Hartford Courant newspaper.
There were no obvious signs of foul play, said Maloney during an interview with WMUR-TV. The silver Jeep Liberty was reportedly locked when police located it on April 13 and it contained Reinhart's luggage, wallet and other belongings, police say.
Reinhart, 50, was reportedly last seen driving away from his brother's Lexington, N.C. house on March 22 bound for his home in Westport. His brother filed a missing persons report on April 12, after more than a week had passed without contact from Reinhart.
Reinhart's family said his cell phone is full and he has not updated his Facebook page, reports WMUR.
The out of place SUV isn't the only mystery in the case.
The last email correspondence sent from Reinhart's account was sent April 2 from Provincetown, Mass., report local news sources.
Reinhart's sister, Anita Boushie lives in Hillsborough, N.H., about 40 miles from Portsmouth, but she says Reinhart had no plans to visit her, reportsthe Westport News.
According to WMUR, police plan to monitor the car, check local hospitals and hotels, and check his phone records and credit reports.
Reinhart is described in a missing person's poster as being 6-foot-4, 260 pounds, with short salt-and-pepper hair and brown eyes.
Anyone with information concerning Reinhart's disappearance is asked to call Portsmouth Police at (603) 436-2145.