police
Cop gets beat up at a party and I ran so
<p>If people get into a scuffle and at a small party and a cop friend is around and he gets beat up and knocked cold out, when he awakes can he legally arrest anyone that was there before but not after he woke up?</p>

<p>I'm wondering in a situation like this, what should occur? How can you be protected if you are an assumed violator but I did not touch anyone (I just cut out).</p>

<p><a href="https://i.stack.imgur.com/3hlJk.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/3hlJk.jpg" alt="enter image description here"></a></p>

<p>In most jurisdictions a peace officer can arrest anyone they have:</p>

<ol>
<li>a warrant to arrest</li>
<li>probable cause to arrest, that is, a reasonable belief that that person has committed a crime</li>
</ol>

<p>They (and others) will conduct investigations to determine if they believe they can secure a conviction. If they do they will lay charges and justice will steer it's majestic course to conviction or acquittal.</p>
