jackie benson, news 4. >>> new details about federal criminal investigation of d.c. mayor vincent gray's 2010 campaign. "the washington post" reporting that federal authorities are probing an alleged shadow campaign of money and expenses not reported by the official gray campaign. the mayor declined to comment to the post. near thely-year-old federal investigation into possible wrongdoing appears to be picking up steam. last week news 4 disclose aid flurry of subpoenas issued in the case. >>> now to the latest in the south of france. an ongoing and dramatic standoff between police and a gunman who says he wanted to bring the country to its knees. it is happening at a house in tuluth, france, seven people killed in ten days. angie? >> reporter: a series of explosions tonight, heightened the tension. the siege involving the suspect in the murders of seven people in southern france is now in its 25th hour. there is still no soon of when it may end. police are still trying to negotiate with 24-year-old mow holed up inside a apartment building surrounded by 300 officers. the gas and electricity is cut off.