Creating Electrons via Compton Scattering

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I'm doing some simulations, and the simulation says that an electron is present that has been created by "compt".

How can an electron be created by Compton scattering? If an electron is knocked out of the shell by a photon, would that not cause another photon to be emitted?
 
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Electrons are not 'created' by Compton scattering. They are simply 'knocked out' of an atom, and a lower energy photon. The Compton electron will interact with other electrons, and eventually when the Compton electron slows down and is reabsorbed, a photon will be emitted.

http://hyperphysics.phy-astr.gsu.edu/hbase/quantum/comptint.html

http://www.wooster.edu/physics/JrIS/Files/ChrisT.pdf
 
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