Propane tank it is.

Summary: A biotech frigate carrying illegal stuff crash-lands nearby after probably getting chased down during the embargo. There's a police shootout as smugglers try to defend their contraband, but the pilot sneaks out the other end of the ship before it gets too dangerous.

The goods are valuable but the ship itself is kinda trashy. The government will be pretty grateful if someone empties the hold over the ocean or something, and won't particularly care what happens to the spacecraft.