Bristol Palin's lawyer is seeking permission to subpoena media outlets such as Playgirl magazine and CNN to determine how much money Levi Johnston, the father of her child, has made to calculate an appropriate level of child support. Attorney Thomas Van Flein filed a motion seeking permission to conduct out-of-state depositions and obtain financial records from the magazine, CNN, Entertainment Tonight, Vanity Fair, the National Enquirer, Star magazine and Insider. It could take a judge weeks to decide on the request by Palin, the teenage daughter of former Alaska Gov. Sarah Palin, the 2008 Republican vice presidential candidate. Johnston, 19, has said he wasn't paid for many of the interviews. His attorney, Rex Butler, didn't immediately return a call Thursday seeking comment. It's the latest twist in the ongoing drama between Johnston and Palin after the birth of their son, Tripp, in December 2008. In court documents filed earlier, Johnston said he made $101,000 last year, but notes that income in the entertainment field can be erratic. A previous estimate of his income was $105,000. Palin is seeking $1,688 a month in child support, down from an initial request of $1,750 after Johnston's income was adjusted. She's also asking for retroactive payments to the boy's birth, or $19,232 total. That does not include $4,400 Johnston has already paid in child support.