Wagner Tejeda-Pena wanted: Suspect accused of killing man on walk in Philly may be in Massachusetts, Rhode Island

Wagner Tejeda-Pena, 24, is wanted in the fatal shooting of Loi Nguyen on June 21 at the 4200 block of L Street.

Surveillance video shows the suspect running after Nguyen and once shooting him in the back of the head as he returned from his morning walk.

Investigators said they found a spent cartridge case from a semi-automatic weapon just inches from the victim.

ALSO SEE: 76-Year-Old Man Killed During Morning Walk Outside Juniata’s Home: Police

Police said he was found near his backyard door. Nguyen was pronounced dead at 5:44 a.m. by medics at the scene.

Fifteen minutes before the murder, police said Tejeda-Pena pointed a pistol at two victims in the 1200 block of East Luzerne. He allegedly pulled the trigger multiple times to fire the gun, but the gun failed and he fled the scene.

On Thursday, Boston police said Wagner Tejeda-Pena is also wanted for two stab wounds and that he recently threatened to kill his family.

Police did not say when the stabbings took place but said the suspect could be in the Roslindale, Lawrence, MA or Rhode Island area.

Wagner Tejeda-Pena should be seen as armed and dangerous.

Anyone with information regarding this case is asked to call the Philadelphia Police Department at 215-686-TIPS or the Boston Police Department at (617) 343-4468.

ALSO SEE: Suspect wanted identified in fatal shooting of 76-year-old man in Juniata Park