3 sentences

1. 我会和她一起去自首。

   wǒ huì hé tā yī​qǐ qù zì​shǒu.

   I'll turn myself in with her.

   Source: OpenSubtitles

2. 我明天就去自首。

   wǒ míng​tiān jiù qù zì​shǒu.

   I'll turn myself in tomorrow.

   Source: OpenSubtitles

3. 他在律师的陪同下向警方自首了。

   tā zài lǜ​shī de péi​tóng xià xiàng jǐng​fāng zì​shǒu le.

   Accompanied by his lawyer, he turned himself in to the police.

   Source: Dong Chinese Dictionary