Ilion woman's ex-boyfriend suspected of murdering her in Maryland

Crime scene on in Columbia, Maryland / Courtesy Howard County Police/Twitter

The ex-boyfriend of a Herkimer County woman who was found dead in her car last week in Maryland is the prime suspect in her murder.

Ryan Patrick Matthias, 43, was arrested on Saturday in Charlotte, North Carolina. Police say he drove 1,000 miles round-trip from the Charlotte area to Columbia, Maryland to kill Deborah Castellano.

Castellano, 47, was found dead from multiple gun shot wounds in her car in an apartment complex parking lot in Columbia, Maryland on May 4.

Police say Castellano had recently moved to the area from New York after being harassed by Matthias, an ex-boyfriend. WKTV reports that she was formerly from Ilion in Herkimer County.

Investigators say Castellano and Matthias were arrested in March following a domestic violence incident in New York.

Since then, police say Castellano ended the relationship and moved to Maryland, but Matthias continued to harass and stalk her. Castellano had not reported the harassment to police in Howard County.

After learning of her death, family members told police they had been concerned for her safety.

According to police, Matthias rented a car in North Carolina the day before Castellano was killed. He returned it two days later, on May 5, with more than 1,000 new miles logged. .

Police in Columbia say they received a 911 call on May 4 reporting a woman who appeared to be injured in a car parked in the 9600 block of Basket Ring Road, Columbia, Maryland.

When they arrived, police found Castellano, who lived at that address, deceased in a Toyota Corolla in the parking lot. She had been shot multiple times.

Matthias is being held on a detainer, awaiting extradition to Maryland to face charges.