rat on

Yet he also refuses to identify someone who can prove his innocence because he does not rat on people, and, he insists, he is innocent of the killings.

He is also loyal and refuses to rat on someone who can prove his innocence.

In 2015, he says, he hurt himself while hiking in Glacier National Park, and subsequently told medical personnel about the old bullet lodged in his arm—requiring him to come up with a cover story to tell the ranger about how it got there because he still didn’t want to rat on the individuals he served with.

In an interview in 2000, he remembered cornering a large rat on the staircase of his communal apartment block.

Ella wouldn't rat on her friends.