KINGSTON, Jamaica -- The father and brother of 17-year-old John Lee Malvo, one of two suspected Washington-area snipers, on Friday expressed disbelief that the teen participated in the recent string of shootings. "He was a good boy. He was a good boy," Malvo's father, Leslie, said in an interview with Reuters when asked if the actions attributed to his son were consistent with what he knew of the boy. "I feel cut-up about it."

Malvo and John Allen Muhammad, a 41-year-old Persian Gulf War veteran, were arrested on Thursday after one of the biggest manhunts in U.S. history.

Muhammad was held on a charge of violating a federal gun law, while the specific charge against Malvo was not made public because federal officials said he was under 18.

Maryland, where six of the 10 killings occurred, planned to charge Muhammad and his traveling companion, Malvo, with six counts of first-degree murder in the sniper siege.

Arrest warrants on these charges were expected later on Friday.

Malvo's brother, Rohan, also expressed disbelief. "I felt so bad about it," he told Reuters. "And for real, I still don't think it's my brother because he's not that type of person."

Beyond the six killings that occurred in Maryland, three were in Virginia and one was in Washington, D.C.

of the three people critically injured, two were in Virginia and one was in Maryland.

Both Maryland and Virginia can impose the death penalty, though there is currently a moratorium on its use in Maryland, and it is not used in cases involving juveniles.

The district of Columbia has no death penalty statute, though it could be sought if the fatal shooting in the U.S. capital was brought as a federal case.