What will happen if many people commit one crime?
<p>For example, if 100 or 1000 participants plan and murder someone in such a manner that they are equally guilty for example, they mutually came with the idea and willingly participated and so on, you get the idea. </p>

<p>Will all be convicted of murder?</p>

<p>If the act and the evidence is sufficient, they will all be convicted. It would not be necessary, for example, to prove that it was Brutus's stab that killed the victim. It is not guaranteed that <em>all</em> of the participants committed the act knowed as <a href="http://app.leg.wa.gov/RCW/default.aspx?cite=9A.32.030" rel="nofollow noreferrer">1st degree homicide</a> (picking Washington law), some may be guilty of <a href="https://app.leg.wa.gov/rcw/default.aspx?cite=9A.28.040" rel="nofollow noreferrer">conspiracy to murder</a>. <a href="https://app.leg.wa.gov/rcw/default.aspx?cite=9A.08.020" rel="nofollow noreferrer">Liability for a crime</a> can extend to others besides the person who "did it":</p>

<blockquote>
  <p>(3) A person is an accomplice of another person in the commission of a
  crime if: (a) With knowledge that it will promote or facilitate the
  commission of the crime, he or she: (i) Solicits, commands,
  encourages, or requests such other person to commit it; or (ii) Aids
  or agrees to aid such other person in planning or committing it</p>
</blockquote>

<p>There was a cause in the UK where a group of 15 people beat up a man, who died from the assault. It was not clear whether anyone wanted him to die, and there is no evidence that anyone on his own would have killed him.</p>
<p>All fifteen were convicted for conspiracy to murder.</p>

criminal-law