It has been explained countless times. The current issues surrounding Ukraine happened during the Obama admin. People are going to be arrested, stand trial, and even possibly be sentenced to capital punishment for treason/sedition. Believe it or not, but that tends to scare some people and they are willing to lie to get out of trouble. Even break the law further in an attempt of a hasty getaway.
Case in point, a bank robber with cops on their tail is not worried about speed limits, traffic laws, and stoplights. They will break more laws, and even get more heinous as they get more desperate to flee. Likewise, the current individuals in question want nothing more than to remain free, and escape prosecution. In the process they will commit shocking acts in an attempt to free themselves.