A grand jury in Charles County has cleared a sheriff's officer of any wrongdoing after he shot and killed a man accused of drunken driving last month.Jonathan Lyles, of Oxon Hill, Md., was shot and killed March 18 as officers tried to arrest him outside an apartment complex on Zekiah Run Road.A makeshift memorial still stands in the La Plata neighborhood where Lyles was shot.The grand jury decision is not sitting well with Lyles' family and friends.Lyles' mother said her son did not have to die and she believes police are covering up their actions."I know that they're wrong. And as far as the investigation, their own people investigate. They didn't have anybody come out and investigate. That's the reason why they were found not guilty," Betty Lyles, the victim's mother said.Police said Lyles was shot after he resisted arrest and started wrestling with several officers. They also said Lyles was shot once, but family members said he was shot three times without serious provocation. [more]