Got thiefs number & fb, now what ?

my money and phone we're stolen around ajah, someone changed the sim and I got his phone no as 23408105087342 (abass)...... my phone imei is 869740025334666I called him and offered to buy it back first he agreed then switched off his phoneafter i do police report, any other suggestions ?UpdateLater in this thread someone used the phone number to track him on Facebook