After hiding in the woods for weeks,the criminal gave himself up.

该罪犯在森林里躲了几个星期后自首了。

He voluntarily surrendered himself to the police.

他主动向警方自首。

We should not insult them, take away their personal effects or try to exact recantations from them, but without exception should treat them sincerely and kindly.

加侮辱，搜财，自首，一律诚恳和气对待之。