2 arraigned in Los Angeles boy's Halloween killing

Two reputed Los Angeles gang members have pleaded not guilty to charges of murdering a 5-year-old boy who was shot as he posed for photos in his Halloween costume.

Eighteen-year-old Marcus Denson and 21-year-old Leonard Hall also pleaded not guilty Friday to attempted murder. They could face life in prison if convicted.

Both remain jailed on $4 million bail each.

Prosecutors allege the men entered rival gang territory and Hall opened fire on a South Los Angeles backyard Oct. 31, shooting Aaron Shannon Jr. in the head as he posed in his Spider-Man costume. Two of his relatives were wounded.

Authorities say the men mistakenly thought rival gang members lived at the home.