I am on the trail,a friend for life,He becomes his old friendly self

[Ju]

The rescue team is searching for victim after the accident. One of the member said, "I am on the trail."

1) What does it mean of "I am on the trail"?

2) What are the meanings of the following sentences?

• He is a friend for life.
• He becomes his old friendly self.

Many thanks.

[yara84]

The sentence "I am on the trail" means that one of the members replied stating that they are looking into / investigating the case.

"He is a friend for life" means that the person in question is a companion / pal to keep for life / truly trustworthy.

"he becomes hid old friendly self" means that the person goes back to behaving the way they did before an event had occured.

Hope this helped,