What is com.apple.dasd.swapkills.plist?

com.apple.dasd.swapkills.plist Anyone know what this is? I've recently had police delete footage off my phone, am taking them to court. Can't get the videos back as I accidentally overwrote them when my iCloud backed up, but I have received the data back from Forensics (I sent my phone to them). I'm not a coder or anything but could use your brains trust to help me decipher some funny business. Some of it may be innocent, but the 3 days my phone was with the police there's definitely activity. I'm just trying to ascertain if some of it is useful for court. Cheers in advance! Jess