PORTER, Ind. (AP) — Northern Indiana police say DNA on latex gloves used in a convenience store robbery led them to a second suspect in that crime.

Porter police charged 24-year-old David Graham with robbery shortly after last June’s heist in the Porter County town.

Capt. John Lane says Graham told officers about a second suspect and latex gloves that were worn during the robbery and thrown from a getaway car.

Police recovered the gloves, although tests by Indiana State Police initially found a mixture of DNA that couldn’t be separated.

But The Northwest Indiana Times reports the gloves were retested with new technology and DNA was found from Graham and 23-year-old Robert A.E. Lewis of Portage.

Lewis was charged Thursday with robbery. He was already in the Porter County Jail on unrelated charges.