Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: A 27-year-old driver has been arrested after allegedly 'doing donuts' on a frozen river until his pickup truck smashed through the ice - then saving his own life while leaving his pet dog behind to die. Andrew Mayer was traveling through New Jersey with his two-year-old boxer mix, Rolo, in the early hours of Sunday when he reportedly drove onto the Toms River, which had completely frozen over. He then repeatedly drove his 1989 Mazda B2200 truck around in circles, causing it to plunge through the ice into the frigid water below, police said. Mayer escaped from the vehicle as it was sinking.Andrew Mayer, 27, allegedly 'did donuts' on the Toms River in New JerseyWhen his pickup truck eventually fell through ice, he escaped from vehicleHowever, he reportedly left two-year-old boxer mix, Rolo, on the backseatBlack-colored pup was discovered dead by divers after witness called 911Now, Mayer has been charged with criminal mischief and careless drivingAnimal cruelty charges also expected to be dealt pending an SPCA inquiryMayer's relatives have claimed suspect tried to save Rolo as vehicle sankHis cousin's fiancée said: 'He almost killed himself trying to save his dog' 
 Question:A spokesman for SPCA added the agency has launched an inquiry into _'s death.

Rolo