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A St. Paul teen has been charged with robbery and murder in the fatal shooting of a 16-year-old from Savage this month.

Ramsey County prosecutors charged Maurice Gaynor Jr., 17, with second-degree murder and first-degree aggravated robbery in the death of Kalven Sin Suy. Prosecutors plan to try him as an adult.

Suy was found shot in the abdomen Feb. 10 at Western Avenue and Topping Street and rushed to Regions' Hospital for surgery. He died Sunday.

Gaynor's adult certification hearing is set for March 13.

Suy's girlfriend, who called 911 the night of the shooting, told investigators that he had asked her to drive him to a meeting with Gaynor around 12:30 a.m. She said Suy sometimes sold marijuana and that he left her car with a red and white shopping bag.

Suy reportedly called her minutes later yelling, "He shot me." The shopping bag was gone, and so was Gaynor. She said she believes he shot Suy.

Investigators say Suy planned to sell Gaynor guns and drugs for around $3,700. Cellphone records show he called Gaynor minutes before the shooting and place Gaynor's phone near the scene at the time.

When police arrested Gaynor on Feb. 16, they found tampered guns, ammunition and the shopping bag that Suy carried the night of the shooting.

Gaynor told police he did not know why he was arrested and said he was at his mother's home on the day of the shooting. He initially denied knowing Suy, but then said he knew him by another name. Gaynor told police he "wasn't going to lie."

Charging documents indicate the teens previously had met in the juvenile detention center.

Gaynor's criminal history includes a conviction for first-degree aggravated robbery last October. In 2021, he was adjudicated as a delinquent for first-degree aggravated robbery and first-degree assault.