Fort McMurray police are looking for two men in the killing of twin brothers last summer. 

James and William Beck, both 17, died June 26th after being stabbed numerous times in a park.

Police do not know where the two men, both in their early 20s and possibly related to each other, are now living.

Police are also looking further into a complaint call that was made that night about two groups fighting in the park.

At the time, police were told eight young men were involved, half described as white and half as black.

Investigators say the area was heavily canvassed at the time, but they're still hoping to speak to anyone who may have been a witness to the events that night.