JOHNSTON, R.I. (WHDH) — A nationwide Amber Alert for missing two-year-old Isaiah Perez ended Sunday night when a Providence patrolman spotted the toddler walking the city streets alone.

“It was a very sorrowful day that two people lost their lives this morning but there could be a happy ending. The happy ending is the child has been located,” said Deputy Chief Daniel Parillo, Johnston Police Department.

Police put out an Amber Alert for the missing boy early Sunday morning following a double homicide at a Johnston home. Family members said the boy's mother and 25-year-old sister were killed. Police have not released the victims’ identities.

Initially police were searching for Malcolm Crowell in connection with the kidnapping and double shooting. On Monday morning, police said he wasn’t connected to the crime and he helped police find the missing toddler in Providence. Officials said Crowell cooperated fully with investigators and he is no longer a person of interest. Police said there is no indication he participated in the crime.

Police continued to search for the missing boy until a Providence officer happened to spot him.

“This was just a vigilant patrol officer sticking in the area, working on some hunches on his own and he comes upon the child wandering,” a police officer said.

The boy was taken to Hasbro Children's Hospital and police officers said he’s doing well.

Police said two men are facing murder and kidnapping charges. Officials aren’t sure yet how or if they knew the victims.

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