Noun
someone who assists in a plot
Source: WordNetpartner-in-crime
The head never rules the heart, but just becomes its partner in crime. Mignon McLaughlin
Things every person should have: •A nemesis. •An evil twin. •A secret headquarters. •An escape hatch. •A partner in crime. •A secret identity. Wil Wheaton
I'm so single. It's funny. I'm usually a relationship girl. I love being in love and having a partner in crime. But it's good to be your own partner in crime. God, that makes me sound like I have multiple-personality disorder. Brittany Snow
Afterwards, Frank catches Dorothy and Jeffrey together and forces them both to accompany him to the apartment of Ben ( Dean Stockwell ), his suave, effeminate partner in crime who is holding Dorothy's son. Source: Internet
“Happy Anniversary to my partner in crime xo love you always & eternally,” Mr Baxter said on Facebook in October 2015, showing a beaming Ms Baxter in their wedding photos. Source: Internet
And maybe a partner in crime who knows what he’s doing. Source: Internet