3 sentences

1. 歹徒在光天化日之下公然行凶。

   dǎi​tú zài guāng​tiān​huà​rì zhī​xià gōng​rán xíng​xiōng.

   The thugs committed violence openly in broad daylight.

   Source: Dong Chinese Dictionary

2. 这名歹徒因为持械行凶被警方当场抓获。

   zhè míng dǎi​tú yīn​wèi chí xiè xíng​xiōng bèi jǐng​fāng dāng​chǎng zhuā​huò.

   The gangster was caught on the spot by the police for armed assault.

   Source: Dong Chinese Dictionary

3. 这些歹徒简直无法无天，竟然敢在光天化日之下行凶。

   zhè​xiē dǎi​tú jiǎn​zhí wú​fǎ​wú​tiān, jìng​rán gǎn zài guāng​tiān​huà​rì zhī​xià xíng​xiōng.

   These thugs are simply lawless, daring to commit crimes in broad daylight.

   Source: Dong Chinese Dictionary