Prosecutors revealed that they have a second surveillance video that they say is evidence that Adam Saalfield fatally stabbed 18-year-old Maggie Rosales in Huntington Station last month.

Saalfield, 21, of Huntington Station, was arraigned on a grand jury indictment Thursday in Riverhead. Prosecutors say Saalfield snuck up on the 18-year-old and sliced her throat as she walked home on Lynch Street on Oct. 12.

As News 12 has reported, part of the attack on Rosales was caught on a store surveillance camera. A suspect is seen in that video wearing a hood and jacket, but his face is not visible. Prosecutors told State Supreme Court Justice William J. Condon they now have surveillance video from a nearby gas station that shows Saalfield wearing the same clothes as the killer just 15 minutes before the murder.

Saalfield's attorney John Loturco says there is not a strong case against his client.

"There is no murder weapon. There is no confession. There is no admission," said Loturco.

Loturco told the judge that there was no relationship between Rosales and Saalfield, even though they lived only a few houses apart.

Prosecutors say they have a mix of Saalfield and Rosales' DNA in a four-block blood trail that leads from the crime scene to Saalfield's house. They have also seized a knife from Saalfield and clothes from his home.

Loturco says he is awaiting all DNA test results, but suggested Saalfield's DNA could have been near the crime scene because he lives in the neighborhood. He also said there is an "alternative suspect" in the case. He says police previously interrogated Rosales' ex-boyfriend.

The prosecutor would not comment on that claim.

Saalfield is charged with second-degree murder. He was held without bail and is due back in court on Dec. 17.