Warren police said the 911 caller said a "huge" animal resembling "a 150-pound cat" was spotted in an old cement drainpipe in Bates Park and 10 officers were sent to the scene, WDIV-TV, Detroit, reported Monday.
The officers saw the outline of the animal in the pipe and shot it with the Taser -- only to discover it was a large toy cougar.
Police Commissioner William Dwyer said investigators believe the incident, which cost the department $1,000 in wasted police hours from responding to the scene and filling out paperwork, was a prank.
Dwyer said the prankster could face 90 days probation and fines equivalent to the wasted police money if caught.
Notable deaths of 2014 [PHOTOS]